Answers
Answer:
temperature means the degree of hotness or coldness of the body
Explanation:
when the heatness is transferred by our body
we feel cold
for example if we touch ice
we feel cold
when the heatness is transferred to our body we feel hot
for example when we touch fire we feel hot
Related Questions
If a 900 kg cow stampedes at 10 m/s, what is the cows kinetic energy?
90j
9000j
45,000j
4500j
Answers
Answer:
45,000 J
General Formulas and Concepts:
Energy
Kinetic Energy Formula: \(\displaystyle KE = \frac{1}{2}mv^2\)
m is mass (in kg)v is velocity (in m/s)Explanation:
Step 1: Define
Identify variables
[Given] m = 900 kg
[Given] v = 10 m/s
Step 2: Solve for KE
Substitute in variables [Kinetic Energy Formula]: \(\displaystyle KE = \frac{1}{2}(900 \ kg)(10 \ m/s)^2\)Evaluate exponents: \(\displaystyle KE = \frac{1}{2}(900 \ kg)(100 \ m^2/s^2)\)Multiply: \(\displaystyle KE = (450 \ kg)(100 \ m^2/s^2)\)Multiply: \(\displaystyle KE = 45000 \ J\)Two major muscles must work together in an agonist and antagonist form to be able to move an arm.
Answers
Answer:
Two major muscles must work together in an agonist and antagonist form to be able to move an arm.
Explanation:
A van of mass 1800kg was moving at a velocity of 9m/s when it was involved in a head on collision with a butterfly moving in the opposite direction. What was the momentum of the van before the collision?if the van look 5 seconds to stop, what was the force acting on the driver?
Answers
Given data:
* The mass of the van is 1800 kg.
* The initial velocity of the van is 9m/s.
Solution:
The initial momentum of the van in the terms of the mass and the initial velocity is,
\(p=mu\)where m is the mass of the van and u is the initial velocity,
Substituting the known values,
\(\begin{gathered} p=1800\times9 \\ p=16200\text{ kgm/s} \end{gathered}\)Thus, the initial momentum of the van is 16200 kgm/s.
(b). The final velocity of the van is zero.
Then, the force acting to stop the van in 5 seconds is,
\(\begin{gathered} F=\frac{p-0}{t} \\ F=\frac{16200}{5} \\ F=3240\text{ N} \end{gathered}\)Thus, the magnitude of the force acting to stop the van is 3240 N.
A student made the electromagnet shown and use it to pick up one sewing pin. Which change to the electromagnet would most likely allow it to pick up two sewing pins?(I attached a picture of the electromagnet and the answer choices)
Answers
ANSWER:
C. Double the numer of coils of wire around the nail
STEP-BY-STEP EXPLANATION:
In order to let him pick up two sewing pins, the student must double the number of coils around the nail.
What was Gan De's contribution to astronomy?
A.
He developed the world's first star catalogue.
B.
He was the first to record a lunar eclipse.
C.
He was the first to observe planets.
D.
He invented the telescope.
Answers
Answer: A. He developed the world's first star catalogue.
Explanation: Gan De's contribution to astronomy was the development of the world's first star catalogue , along with his colleague Shi Shen. He also made observations of the planets, particularly Jupiter, and may have been the first to describe one of Jupiter's moons. Unfortunately, all of Gan De's writings have been lost, but fragments of his works' titles and quoted fragments are known from later texts.
In a DC generator, the generated emf is directly proportional to the
Answers
In a DC generator, the generated electromotive force (emf) is directly proportional to the rotational speed of the generator's armature and the strength of the magnetic field within the generator.
This relationship is described by the equation for the generated emf in a DC generator:
Emf = Φ * N * A * Z / 60
Where:
Emf is the generated electromotive force (in volts),
Φ is the magnetic flux density (in Weber/meter^2\(meter^2\) or Tesla),
N is the number of turns in the armature winding,
A is the effective area of the armature coil (in square meters),
Z is the total number of armature conductors, and
60 is a constant representing the conversion from seconds to minutes.
From this equation, we can see that the generated emf is directly proportional to the magnetic flux density (Φ) and the product of the number of turns (N), effective area (A), and the total number of armature conductors (Z). This means that increasing any of these factors will result in a higher generated emf.
The magnetic flux density (Φ) can be increased by using stronger permanent magnets or increasing the strength of the field windings in the generator.
The number of turns (N) and the effective area (A) are design parameters and can be optimized for a specific generator. Increasing the number of turns or the effective area will result in a higher generated emf.
Similarly, the total number of armature conductors (Z) can be increased to enhance the generated emf.
By controlling and optimizing these factors, the generated emf in a DC generator can be increased, resulting in higher electrical output. However, it is important to note that there are practical limits to these factors based on the design and construction of the generator.
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The speed of sound
Medium Air (0C) Air (20°C) Helium (0°C) Ethyl alcohol Water Human tissue (ultrasound Lead Aluminum Granite Diamond
Speed (m/s) 331 343 970 1170 1480 1540 1200 5100 6000 12.000
Oil explorers set off explosives to make loud sounds, then listen for the echoes from underground oil deposits. Geologists suspect that there is oil under 480-m-deep Lake Physics. It's known that Lake Physics is carved out of a granite basin. Explorers detect a weak echo 0.930 ss after exploding dynamite at the lake surface. Part A If it's really oil, how deep will they have to drill into the granite to reach it
Answers
Answer:
Explanation:
Let the required depth be d .
Sound will first travel trough 480 m deep lake . Then it will enter granite layer . Sound travelling through granite will reach oil level , get reflected and come back to the surface of lake as echo . Total time taken by sound to travel total distance is .93 s
Total distance = 2d + 2 x 480 m
= 2d + 960 m
speed of sound in granite is given as 6000 m / s and speed through water is 1480 m /s
total time taken
= 2d / 6000 + 960 / 1480 = .93
2d / 6000 + .6486 = .93
2d / 6000 = .2814
d= 844.2 m
A cart with mass m subscript 1 equals 0.25 space k g is at rest on a track. A second cart of mass m subscript 2 equals 0.35 space k g is pushed down the track and collides with it. The carts stick together after the collision. The second cart's speed immediately before the collision is v subscript 02 equals 6.17 space m divided by s. The overall magnitude of the carts' common final velocity is _______________ (enter the numerical value only, in m/s).
Answers
After considering the given data and information we come to the conclusion that overall magnitude of the carts' common final velocity is 3.6 m/s, under the condition that a cart with mass m subscript 1 equals 0.25 space k g is at rest on a track.
Then, we can apply the law of conservation of momentum to evaluate the common final velocity of the carts.
The law of conservation of momentum projects that the total momentum of an isolated system stays constant if no external forces act on it. For this required case, the system is the two carts.
Before the collision, the first cart is in the rest and the second cart has a velocity of 6.17 m/s. Hence, the total momentum of the system before the collision is
p = m₁v₁ + m₂v₂
Here,
m1 and m2 are the masses of the carts and `v1` and `v2` are their velocities.
Staging the given values,
p = (0.25 kg)(0 m/s) + (0.35 kg)(6.17 m/s)
Applying simplification this expression
p = 2.16 kgm/s
Post the event of collision, the two carts stick along each other and move with a common final velocity `v`. The total momentum of the system after the collision is
p = (m₁ + m₂)v
Staging the given values, and evaluate for v
v = p / (m₁ + m₂)
Staging the given values
v = (2.16 kgm/s) / (0.25 kg + 0.35 kg)
v = 2.16/0.6
Applying simplification this expression
v ≈ 3.6 m/s
Then, the overall magnitude of the carts' common final velocity is approximately 3.6 m/s.
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PLEASE ANSWERRRRR
a) A microwave oven that draws 0.8 kWh is used for one hour. At a cost of 7.5 cents per kWh, what is the cost of the microwave’s electrical energy consumption?
b) What is the cost for the microwave if it is used one day for 20 min?
(c) What is the cost of using the microwave for 20 min a day for a month of 30 days?
Answers
a) The cost of using the microwave oven for one hour is 6 cents.
b) The cost of using the microwave oven for 20 minutes in a day is 2 cents.
c) The cost of using the microwave oven for 20 minutes a day for a month of 30 days is 59 cents.
a) The microwave oven draws 0.8 kWh of electricity for one hour. The cost of electricity per kWh is 7.5 cents. Therefore, the cost of using the microwave oven for one hour can be calculated as follows:
Cost = 0.8 kWh x $0.075/kWh = $0.06
b) If the microwave oven is used for 20 minutes in a day, the energy consumed can be calculated as follows:
Energy consumed = Power x Time
Power = Energy consumed / Time
We know that the microwave oven draws 0.8 kWh of electricity for one hour. Therefore, the power can be calculated as:
Power = 0.8 kWh / 1 hour = 0.8 kW
The time for which the microwave is used is 20 minutes, or 0.33 hours. Therefore, the energy consumed can be calculated as:
Energy consumed = Power x Time = 0.8 kW x 0.33 hours = 0.264 kWh
The cost of using 0.264 kWh of electricity can be calculated as:
Cost = 0.264 kWh x $0.075/kWh = $0.02
c) If the microwave oven is used for 20 minutes a day for a month of 30 days, the energy consumed can be calculated as:
Energy consumed = Power x Time x Number of days
Power = Energy consumed / Time
Using the same values of power and time as in part b, the energy consumed for 30 days can be calculated as:
Energy consumed = 0.8 kW x 0.33 hours x 30 days = 7.92 kWh
The cost of using 7.92 kWh of electricity can be calculated as:
Cost = 7.92 kWh x $0.075/kWh = $0.59
In summary, the cost of using a microwave oven for electrical energy consumption depends on the power rating of the oven and the cost of electricity per kWh. By calculating the energy consumed and multiplying it by the cost per kWh, one can determine the cost of using the microwave for a particular period of time.
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How do you support adolescent development?
Answers
Answer:
Adolescent Development
Adolescence is the period of transition between childhood and adulthood. Children who are entering adolescence are going through many changes. This article offers advice for adolescents and parents to negotiate these changes.
Answer:
How do you support adolescent development?
Explanation:
Parents are a key support for teens during this time of growth and reflection. Be aware of the stages of emotional development, and provide clear guidance at each phase. Acknowledge when to give space and independence to teens. Help guide teens to feel good about themselves.
I hope that helped.:)
I have snap chat if you need it.
Let me know if you need help with anything else?
please answer please please
Physics
Answers
Answer:
about -1.26 m/s²
Explanation:
The acceleration can be found from the formula ...
a = (v2² -v1²)/(2d)
Here, we have the initial velocity v1=23 m/s, the final velocity v2=0, and teh distance d=210 m. Using the formula, we find the acceleration to be ...
a = (0 -23²)/2(210) ≈ -1.2595 . . . m/s²
Many of the important discoveries of genetics and inheritance came from these:
fruit flies
zebras
enzymes
Answers
Answer:
fruit flies
Explanation:
luv you <3
40 points
For this assignment, you will research how to design and build a solar cooker. Search reliable online sites
for “solar cookers.” After getting the materials you need from your teacher, you will present your initial
design as a drawing or illustration. You will then build your device and test its efficiency by warming up a
hot dog until it reaches an internal temperature of 165°F, recording how long it took you to reach this
temperature. Based on your tests, you will make recommendations on how to improve the design of your
solar cooker, and then present your final design and the logic that supports it in a lab report. Your lab
report should include a title, a list of materials that you used to build your solar cooker, a drawing of your
initial design, observations from your experimental tests, recommendations for a final design based on
what you know about radiation, a drawing of your final design, and the results of the efficiency test. To
help you write your lab report, there is a Student Worksheet on the last few pages of this document.
Answers
Answer:
Ideas for Prototype Design
Similar to a cardboard oven just smaller and solar powered
Preliminary Sketches (attach separate paper, if needed)
Option A: i gave the picture
____________________________________________________________
Advantages: Disadvantages:
● the tin foil will attract the sun● if theres enough heat for the food to warm up
●the plastic will keep bugs and/or animal away from getting it ● it might take longer
●the box gives the food something to be in instead of the ground
Option B: i think im going to stay with my original plan i can always make changes
__________________________________________________________
More advantages and disadvantges
Advantages: Disadvantages:
●reducing my carbon footprint by alot ● heat varies so the food my take really really long
●using no energy other than the sun
__________________________________________________________
Which of the three designs will you move forward with? Explain your reasons for selecting this design.
I will be moving forward with option A bc i personally can't think of another way or design and i think option A has more advantages than disadvantages
__________________________________________________________
Building the Prototype
What modifications, if any, did you make to the basic design during the construction process?
I used skewers to hold the flap up
__________________________________________________________
Predictions
Will your device warm the hot dog to a temperature of 165°F? How will your device do this?
Well i guess it depends n alot of things such as where i will place my solar cooker and the weather changes i will most likely put my solar cooker on the black paper because darker colors absorb more heat then lighter ones, then i will wait maybe 10 -20 minutes and check on my hotdog
__________________________________________________________
Will your device efficiently warm the hot dog in 20 to 25 minutes? How will your device do this? so my device will do this by attracting the suns rays and energy towards the box
__________________________________________________________
Will your device reach a temperature well above that of its surroundings? How will your device do this?
I think so especially if i put it in direct sunlight around a darker surface and of course the aluminium foil will help with this as well
__________________________________________________________
Observations
Record your observations and the results of the experimental tests of your device below. Temperature of the surroundings (in °F): ______68_______
Maximum temperature reached inside the solar cooker (in °F): _____59_____
__________________________________________________________
i added a picture but i will also put the numbers here althought keep in mind u might want to switch them up because its based off of my temperatures
Use this table to record the internal temperature of the hot dog every 2 minutes. Use a separate sheet of paper, if necessary.
time: Temperature (°F)
4:00 20
4:02 20
4:04 25
4:06 26
4:08 30
4:10 34
4:12 38
4:14 40
4:16 44
4:18 46
4:20 50
4:22 55
4:24 57
4:26 60
4:28 65
4:33 72
4:35 75
4:37 76
4:39 80
__________________________________________________________
Evaluating Your Prototype
What worked well?
i would say definitely the black paper and tin foil sin they attracted most of the suns energy
__________________________________________________________
Which features can be improved upon?
i think maybe if i did t on a different day it would have gotten hotter
__________________________________________________________
How could the overall design of this device be improved?
Position the flap more so that the hotdogs can get more sun
Doing it on a hotter day
Letting it cook longer
__________________________________________________________
Why would this change be an improvement? What concepts related to thermal energy transfer is this improvement based on?
this change would be an improvement by the hotdogs getting warmed to the right temperature this is related to thermal energy by the position of the flap i think if i angled it more in an abtuse angle the sun would have transferred to the foil to the bottom foil with the hotdogs
__________________________________________________________
Sketch of Your Final Design
Draw a well-labeled sketch of the final design.
i provided a sketch it should be the last picture
OKAY FINALLY PLZ DONT REORT THIS I WORKED SO HARD ON IT LAST TIME AND IT GOT DELETED IF U HAVE ANY QUESTIONS ABOUT THE PROJECT I WILL TRY TO HELP YOU IN THE COMMENTS THANK YOUUUU - ( if your wndering what grade i got on this got a 100 percent )
OH AND PEACE.
Answer:
I am simply adding another answer so the one above can get a brainliest
Explanation:
I do not care about the points that I will wind up getting for this and they are right here just answer with gibberish
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edit: in an attempt to return your points my question was taken down ill will return these
somehow
someway
sometime
When the propeller were turning at 25 rad/s , what is the period (in seconds) of this propeller?
Answers
Answer:
Explanation:
T = (2π rad / rev) / (25 rad/s) = 0.251327... = 0.25 s
The propeller was turning at 25 rad/s then the period of the propeller will be equal to 0.25 seconds.
What is Velocity?In terms of physics, velocity is a vector assessment of the motion's direction and speed. The rate of change in an object's position relative to a reference frame and time is the more precise definition of velocity. Simply put, the concept of velocity informs us of the rate at which an object is travelling in a given direction.
It indicates the rate of motion of objects. Take two moving things like our illustration. If both items are travelling in the same vague direction, it is simple to determine which is moving more quickly.
From the given data in the question,
T = 2π (rad/rev) / 25 (rad/s)
T = 0.25 seconds.
Therefore, the period of this propeller is 0.25 seconds.
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Jake and Reuben are practicing for their weightlifting meet at school.
Jake applies 800 newtons of force to the barbell and lifts it above his head, Reuben also applies 800 newtons of force to the same
barbell, but he is a bit taller than Jake and has longer arms, so he lifts it farther above the ground. Which of the following statements
is true?
OA. Jake did more work
ОВ.
Neither of them did work.
C. Reuben did more work.
D
They did the same amount of work
Answers
Answer:
no Jake arm is high so the weight of an object become high due to potential energy.
so, option A is correct ) Jake did more work
the waves that heat a cup of water in the microwwave are an example of electromagnetic waves. True or False
Answers
Given that the luminosity of a star is given as a function of its radius and temperature by the equation. I do not understand this last question in terms of what to put into the given equation.
Answers
The luminosity of this star in units of the solar luminosity would be: 483.7L.
How to calculate the luminosityTo calculate the luminosity, we would use the different values given and the formula for luminosity.
Temperature = 9305K
Star's radius = \(5.90 * 10^{9} m\\\)
Luminoisty of the star
Luminosity of the sun
= \(\frac{4π * (5.90 * 10^9)^2 * 5.67 * 10^-8 * 9305^4 W}{3.846 * 10^26 W}\)
= 483.7L
This is the unit for luminosity.
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A well-coated structure is defined as A) 95% or better B) 90% or better C) 99% or better D) 93% or better
Answers
Answer and Explanation:
A well-coated structure is defined as having a coating that meets a certain standard of quality. The answer to this particular question depends on the specific criteria being used to evaluate the coating. This would typically require a coating coverage of 90% or better, if not higher.
However, in general, a well-coated structure would typically refer to a surface that has been thoroughly and evenly covered with a coating material such as paint or varnish. This ensures that the underlying material is protected from environmental factors such as moisture and UV radiation. In addition, a well-coated structure can also improve the overall appearance of the surface, making it more aesthetically pleasing. Regarding the options provided in the question, the answer would depend on the specific criteria being used to evaluate the coating. However, it is safe to say that a well-coated structure would require a high level of coating coverage, with minimal areas left uncovered or with an uneven application. This would typically require a coating coverage of 90% or better, if not higher. Ultimately, the specific answer would depend on the standards and expectations set by the evaluating body.
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A well-coated structure is defined as having a coating that meets a certain standard of quality. The answer to this particular question depends on the specific criteria being used to evaluate the coating. This would typically require a coating coverage of 90% or better, if not higher.
However, in general, a well-coated structure would typically refer to a surface that has been thoroughly and evenly covered with a coating material such as paint or varnish. This ensures that the underlying material is protected from environmental factors such as moisture and UV radiation. In addition, a well-coated structure can also improve the overall appearance of the surface, making it more aesthetically pleasing.
Regarding the options provided in the question, the answer would depend on the specific criteria being used to evaluate the coating. However, it is safe to say that a well-coated structure would require a high level of coating coverage, with minimal areas left uncovered or with an uneven application. This would typically require a coating coverage of 90% or better, if not higher. Ultimately, the specific answer would depend on the standards and expectations set by the evaluating body
The first P-wave of an earthquake travels 5600 kilometers from the epicenter and arrives at a seismic station at 10:05 a.m. At what time did this earthquake occur?
Ahhhhhh I have a Regent's test in 2 hours and I don't know how to solve this type of question! Any help would be appreciated.
Anyone know what the steps to do this are? I dont even need an answer, just how to get to it. Thank you!
Answers
The earthquake would occur 13 minutes before 10:05 a.m. which will be at 9.52 am.
The p-waves travel with a constant velocity of 7 km/s
The time can be calculated by using the formula
t = d / v
where
T1 = 10:05 a.m
d is the distance they take to travel from the epicenter
v is the speed of the p-waves
On average, the speed of p-waves is
v = 7 km/s
d = 5600 km (given)
Substituting the values in the formula;
t = d / v
t = 5600 ÷ 7
t = 800 seconds
Converting into minutes,
t = 800 ÷ 60
t = 13.3
≈ 13 mins
T1 - 13 mins = T2
10:05 - 13 mins = 9.52 am
It means the earthquake occurred prior 13 minutes, that is at 9.52 am.
Therefore, the earthquake occurred at 9.52 am.
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Help me please please?
Answers
Answer: I looked it up and it says something about the waves traveling in a solid but I don’t know if that’s correct.
Answer:
all of the above
Explanation:
Gases help with the waves temperature, Solids help with the form of the wave, and liquids help with the amount of things are in the oceans wave.
5
Select the correct answer.
What is the current in a parallel circuit which has two resistors (17.2 ohms and
22.4 ohms) and a power source of 6.0 volts?
ОА.
0.30 amps
OB.
9.8 amps
OC.
0.61 amps
D.
1.2 amps
Reset
Next
Answers
Answer:
Current in a parallel circuit = 0.61 amps (Approx)
Explanation:
Given:
Voltage V = 6 volt
Two resistors = 17.2 , 22.4 in parallel circuit
Find:
Current in a parallel circuit
Computation:
1/R = 1/r1 + 1 / r2
1/R = 1/17.2 + 1 / 22.4
R = 9.73 ohms (Approx)
Current in a parallel circuit = V / R
Current in a parallel circuit = 6 / 9.73
Current in a parallel circuit = 0.61 amps (Approx)
b) A child looking into a small, polished hemispherical metal bowl sees an erect image of himself 21cm from the bowl. He turns the bowl over and sees a further erect image of himself 7cm from the bowl. What is the radius of curvature of the bowl?
Answers
The radius of curvature of the bowl is 42 cm. It should be noted that this is a negative value, indicating that the mirror is concave (curved inward) rather than convex (curved outward).
The situation described can be modeled using the thin lens equation, which relates the object distance, image distance, and focal length of a lens or curved mirror. In this case, we can assume that the bowl acts as a concave mirror, with its reflecting surface forming a portion of a sphere.
We can also assume that the mirror is thin, meaning that the distance between the reflecting surface and the center of curvature is much greater than the radius of curvature.
Let us denote the radius of curvature of the mirror as R. When the child looks into the bowl, an erect image of himself is formed at a distance of 21 cm from the bowl. Using the thin lens equation, we can write:
\(1/f = 1/d_o + 1/d_i\)
where f is the focal length of the mirror, \(d_o\) is the object distance (i.e., the distance between the child and the mirror), and \(d_i\)is the image distance (i.e., the distance between the mirror and the image).
In this case, the object distance is negative (since the child is looking into the bowl from the same side as the object), and the image distance is positive (since the image is erect). Substituting the given values, we obtain:
\(1/f = -1/21 + 1/d_i\)
Next, when the child turns the bowl over, another erect image of himself is formed at a distance of 7 cm from the bowl. Using the same equation, we can write:
\(1/f = -1/d_o + 1/d_i'\)
where d_i' is the image distance for this case. In this case, the object distance is positive (since the child is looking at the bowl from the opposite side of the object), and the image distance is also positive (since the image is erect). Substituting the given values, we obtain:
\(1/f = 1/7 + 1/d_i'\)
Now we have two equations for f in terms of \(d_i\) and \(d_i\)', respectively. We can solve for \(d_i\)and \(d_i\)' by setting these two equations equal to each other and simplifying:
\(-1/21 + 1/d_i = 1/7 + 1/d_i'\\d_i' = 1/(1/7 - 1/21 + 1/d_i) = 28 cm\)
Now that we know both image distances, we can solve for the radius of curvature R using the mirror formula, which relates the focal length to the radius of curvature:
1/f = 2/R
Substituting the values of f and \(d_i\), we obtain:
\(1/R = 2/f = -1/21 + 1/d_i\)
Solving for R, we obtain:
R = -42 cm
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An engine does 18500 J of work and rejects 7810 J of heat into a cold reservoir whose temperature is 285 K. What would be the smallest possible temperature of the hot reservoir
Answers
This question involves the concepts of thermal efficiency and hot reservoir.
The smallest possible temperature of the hot reservoir would be "960 k".
The thermal efficiency of an engine is given by the following formula:
\(Efficiency=\frac{Work}{Heat\ In}=\frac{Work}{Work+Heat\ Rejected}\\\\Efficiency = \frac{18500\ J}{18500\ J+7810\ J}\\\\Efficiency = 0.703\)
Another formula for thermal efficiency of an engine is:
\(Efficiency = 1-\frac{T_2}{T_1}\)
where,
T₁ = Temperature of the hot reservoir = ?
T₂ = Temperature of the cold reservoir = 285 k
Therefore,
\(0.703=1-\frac{285\ k}{T_1}\\\\\frac{285\ k}{T_1}=1-0.703\\\\T_1=\frac{285\ k}{0.297}\)
T₁ = 960 k
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An increase in temperature causes a decrease in the amount of gas able to dissolve in a liquid solvent. Why does this occur?
OA.
increased solubility
ОВ.
increased kinetic energy
ОC. .
large molecules
OD. decreased potential energy
Answers
Answer:
ОВ. increased kinetic energy
Pam, wearing a rocket pack, stands on frictionless ice. She has a mass of 40.0 kg. The rocket supplies a constant force for 22 m and Pam acquires a speed of 62 m/s. What is the magnitude of the force?
Answers
The force is 3496 N
What is the acceleration?Acceleration is the rate at which an object's velocity changes over time. Mathematically, acceleration is defined as the change in velocity (delta v) divided by the change in time.
The unit of acceleration in the International System of Units (SI) is meters per second squared (m/s²). This means that if an object's velocity changes by 1 meter per second (m/s) every second, its acceleration is 1 m/s².
We know that;
v^2 = u^2 + 2as
Where u = 0
v^2 = 2as
a = v^2/2s
a = (62)^2/ 2 * 22
a = 87.4 m/s^2
Force = ma
= 40 Kg* 87.4 m/s^2
= 3496 N
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Which performs a function that is most like the function of a retina?
Answers
Answer:
The answer is ciliary body and focus the pupil. In addition, the ciliary body is a portion of the eye that contains the ciliary muscle that reins the shape of the lens and the ciliary epithelium that yields the aqueous humor. The ciliary body is a share of the uvea which is the layer of tissue that transports oxygen and nutrients to the eye nerves while the pupil is a hole positioned in the midpoint of the iris of the eye that permits light to foray the retina. It looks black since light rays incoming the pupil are moreover engrossed by the tissues in the eye openly or engrossed after diffuse reflections in the eye that typically miss leaving the fine pupil
Explanation:
Answer:the eye has many parts that must work together in order to produce clear vision
Explanation: correct on my test
What comes to mind when you think of the
word energy?
Think of all of the ways that you have heard
people use that word.
Answers
Good energy, Bad energy, Energy used to run, Energy drinks,
A wave has an amplitude of 0.0800 m
and is moving 7.33 m/s. One oscillator
in the wave takes 0.230 s to go from
one crest to the next crest. Find the
wavelength of the wave.
(Unit = m)
Answers
If a wave has an amplitude of 0.0800 m and is moving 7.33 m/s. The
wavelength of the wave is 1.69m.
What is the wavelength?The wavelength of a wave can be determined using the equation:
Wavelength = velocity / frequency
To determine the frequency we need to calculate the reciprocal of the time it takes for one complete oscillation.
frequency = 1 / time
frequency = 1 / 0.230
frequency ≈ 4.35 Hz
Substitute the values into the wavelength equation:
wavelength = velocity / frequency
wavelength = 7.33 / 4.35
wavelength ≈ 1.69m
Therefore the wavelength of the wave is approximately 1.69 meters.
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predict the order of increasing electronegativity in each of the following groups of elements. (use < symbol to separate substances in the list.)
Answers
Electronegativity is a tendency of a atom/element to attract the pair of electrons.
B,O,Gaelectronegativity order = O>B>Ga
Mg,Ba,Caelectronegativity order = Mg>Ba>Ca
Ga,Al,Pelectronegativity order =P>Ga>Al
Al,O,Celectronegativity order =O>C>Al
When an atom of a certain chemical element forms a chemical bond, it has a propensity to draw shared electrons (or electron density). The atomic number and the separation of the valence electrons from the charged nucleus have an impact on an atom's electronegativity. An atom or a substituent group will draw electrons in greater amounts the higher the associated electronegativity. The sign and amplitude of a bond's chemical polarity, which characterizes a bond along the continuous scale from covalent to ionic bonding, can be quantitatively estimated using electronegativity. The inverse of electronegativity is electropositivity, which describes an element's propensity to accept valence electrons.
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In a tractor pull, a tractor put 250,000 J of work into pulling a large mass.
The tractor pulls the mass using 98,000N of force. How far did the
tractor pull the mass?
Answers
In a tractor pull, a tractor put 250,000 J of work into pulling a large mass. The tractor pulls the mass using 98,000N of force. The tractor pulled the mass to a distance of 2.55 meters
We may use the work done formula to solve this problem:
Work = Force x Distance x Cosine (angle between force and displacement)
Yet, because the force and displacement are applied in the same direction, the angle between them is zero, and the cosine of zero is one. As a result, we may reduce the formula to:
Work = Force x Distance
Because we know the work done is 250,000 J and the force exerted is 98,000 N, we can rewrite the formula to solve for distance:
Distance = Work / Force
Distance = 250,000 J / 98,000 N
Distance = 2.55 meters
As a result, The tractor pulled the mass to a distance of 2.55 meters
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