Answers
On the way down the ball's velocity is Positive 9.8.
Option A) is the correct answer.
What is velocity:?
This refers to the speed at which an object moves in a given direction. It unit is meters per secocond, m/s.
What is acceleration?
This is the rate of change of velocity with respect to time. The speed and direction of the accelerating object are also very important. It unit is meters per second square, m/s².
What is Gravity?
This is the force that pulls a body toward the center of the earth. This force causes objects to fall freely. This free-falling object has an acceleration of 9.8m/s downward the earth. This is called acceleration gravity.
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Related Questions
A stone dropped from the top of a building strikes the ground in 4.2 s. How tall is the building? Someone explain please!
Answers
Answer:
well i'm not sure if which unit of measure you need but i think its 86.49 meters tall.
A plane is approaching landing at 140km/sec. It decelerates at a rate of -14.82 km/sec². How much time would it take the plane to land and come to a complete stop?
Answers
Answer:
Initial velocity, u = 600km/h
Final velocity, v = 1100km/h
Acceleration = 10km/h/s=600km/h2
From relation,
a=t(v−u)
t=a(v−u)
t=600(1100−600)
=500/600=5/6 hr=50 sec
Part A
As an object moves around, on which quantities does the change in its gravitational potential energy depend? Choose all that
apply.
Answers
A man pulls a sled at a constant velocity across a horizontal snow surface. If a force of 85 N is being applied to the sled rope at an angle of 56° to the ground, what is the force of friction between sled and snow?A. 85 NB. 70 NC. 48 ND. 5 NE. 43 N
Answers
The force of friction between sled and snow 43 N.The correct answer is E. 43 N.
To solve this problem, we need to use trigonometry to find the horizontal and vertical components of the force being applied to the sled. The horizontal component of the force is given by:
Fhorizontal = Fapplied x cos(θ)
where Fapplied is the force being applied (85 N) and θ is the angle between the force and the ground (56°).
Plugging in the values, we get:
Fhorizontal = 85 N x cos(56°)
Fhorizontal ≈ 48 N
Since the sled is moving at a constant velocity, the force of friction must be equal and opposite to the horizontal component of the applied force.
Therefore, the force of friction is 48 N. Choice E. 43 N
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How can momentum conservation be explained using money?
Answers
Bobby does work to climb to the top of a 7 m hill. If Bobby and his sled have a combined mass of 45 kg, howmuch Potential Energy will Bobby have at the top of the hill? (Ignore friction in this problem.)
Answers
Take into account that the potential energy is given by the following formula:
U = m·g·h
where
m: mass = 80 kg
g: gravitational acceleration constant = 9.8m/s²
h: height = 7 m
Replace the previous values into the expression for the potential energy U:
U = (80 kg)(9.8 m/s²)(7 m)
U = 5,488 J
Hence, Bobby will have a potential enrgy of 5,844 J when he is a the top of a 7 m hill.
how do population of juvenile salmon alter respond to changes in salinity
Answers
Poorly Understood
The influence of salinity, temperature and physiological development on habitat choice by juvenile salmon is poorly understood.
Answer:
Below
Explanation:
It is likely that changes in salinity can affect the population of juvenile salmon in a number of ways. For example, if the salinity of the water increases, it can lead to increased stress on the fish and make it more difficult for them to survive.
This can lead to a decrease in the population of juvenile salmon. On the other hand, if the salinity decreases, it can make it easier for the fish to survive and potentially lead to an increase in the population.
It is important to note, however, that the exact response of the population to changes in salinity will depend on a variety of factors, such as the species of salmon, the specific environment in which they are living, and the magnitude of the change in salinity.
work is done when a weightlifter lifts a barbell. a very strong athlete can lift a 350 n barbell a distance of 2 meters from the ground. how much work is done on the barbell?
Answers
The work done on the barbell is 700 Joule. The result is obtained by multiplying the distance by the force.
How to find the work done on an object?
The work done on an object can be counted by the equation:
W = F × d
Where
W = Work (Joule or Nm)F = Force (Newton)A weightlifter lifts a barbell with a mass of 350 N. It reach the distance of 2 meters from the ground.
Find the work done on the barbell!
We have
F = 350 Nd = 2 mThe work done on the barbell will be
W = F × d
W = 350 × 2
W = 700 Joule
Hence, on the barbell is done the work of 700 Joule.
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Force = 700 N , Pressure = 10 Pascal
Area = ?
Answers
Answer :-
Force is 70 meter² .Explanation :-
As per the provided information in the given question, Force is given as 700 Newton. Pressure is given as 10 Pascal. And, we have been asked to calculate the Area.
For calculating the Area , we will use the Formula :-
\( \bigstar \: \: \: \boxed {\sf { \: Area \: = \: \dfrac {Force}{Pressure \: } }} \)
Therefore , by Substituting the given values in the above Formula :-
\( \Longrightarrow \: \: \: \sf {Area \: = \: \dfrac {Force}{Pressure}} \)
\( \Longrightarrow \: \: \: \sf {Area \: = \: \dfrac {700}{10}} \)
\( \Longrightarrow \: \: \: \bf {Area \: = \: 70} \)
Hence :-
Area = 70 meter² .\( \underline {\rule {180pt}{4pt}} \)
Which of the following is an example of a difference between planets in the solar system?
A planet can have a surface made of either liquid or gas.
Some planets have thick atmospheres, while others have thin atmospheres.
A planet must have a moon, but it can differ in terms of its size.
All planets have rings, but some are very hard to see with your eyes.
Answers
Answer:
A planet can have a surface made of either liquid or gas.
Hope it helped brainiest plz and thank you.
Explanation:
Which of the following is an example of a difference between planets in the solar system?
"A planet can have a surface made of either liquid or gas."
that's the answer:A planet can have a surface made of either liquid or gas.
Answer:
A i know its correct please give brainliest and does anydoby here play sky: children of light
Explanation:
Which characteristics of an area could best identify the type of biome it is
Answers
Answer: average annual rainfall, average annual temperatures, types of plants and animals native to the area
Explanation: the best way you can identify a biome is by telling which animal or species are native to the certain area
Planets A and B have the same size, mass, and direction of travel, but planet
A is traveling through space at half the speed of planet B. Which statement
correctly explains the weight you would experience on each planet?
A. You would weigh the same on both planets because their masses
and the distance to their centers of gravity are the same.
B. You would weigh less on planet B because it is traveling twice as
fast as planet A.
C. You would weigh the same on both planets because your mass
would adjust depending on the planet's speed.
D. You would weigh more on planet B because it is traveling twice as
fast as planet A.
Answers
Answer: A
Explanation:
Answer:
A. You would weigh the same on both planets because their masses and the distance to their centers of gravity are the same.
Explanation:
A pe x :)
If John walks 10 m to the right, 6m to the left, 2m to the right, and then 9m to the left.What is the total distance, and the total displacement of John after all these movements.
Answers
Answer: Total Distance: 27 meters
Displacement: -3 meters or 3 meters to the left.
Explanation: Total distance means the total distance John traveled. In this case we can add up all the movements he made. This would be:
10+6+2+9 = 27 meters.
Displacement is the distance from the starting point after all the steps. The best way to think of this is moving left as negative and right as positive. This means
10 - 6 + 2 - 9 = -3 meters.
This means from his original starting point, he is 3 meters from the left of it after all the movements.
Hope this helped!
Which quantity is measured in newton seconds
Answers
A ball is launched from the ground with a horizontal speed of 30 m/s and a vertical speed of 30 m/s. What far vertically will it travel before hiting the ground A. 40 m B. 30 m C. 60 m D. 50 m
Answers
Answer:
First, let's think in the vertical problem:
The acceleration will be the gravitational acceleration:
g = 9.8 m/s^2
a = -9.8 m/s^2
For the velocity, we integrate over time:
v(t) = (-9.8 m/s^2)*t + v0
Where v0 is the initial velocity, in this case v0 = 30m/s.
v(t) = (-9.8 m/s^2)*t + 30m/s
Now, for the position we integrate again over time, and get:
P(t) = (1/2)*(-9.8 m/s^2)*t^2 + 30m/s*t + p0
Where p0 is the initial position, as the ball is launched from the ground, we can use p0 = 0m
p(t) = (-4.9m/s^2)*t^2 + 30m/s*t
Now, the maximum vertical height is reached when:
v(t) = 0m/s = -9.8m/s^2*t + 30m/s
t = 30m/s/9.8m/s^2 = 3.06s
Now we can evaluate the vertical position in t = 3.06s
p(3.06s) = (-4.9m/s^2)*(3.06)^2 + 30m/s*3.06 = 62m
So, rounding down, the correct option is: C. 60 m
How much energy does it take to boil water for pasta? For a one-pound box of pastayou would need four quarts of water, which requires 15.8 kJ of energy for every degreeCelsius (°C) of temperature increase. Your thermometer measures the startingtemperature as 48°F. Water boils at 212°F.a. How many degrees Fahrenheit (°F) must you raise the temperature?b. How many degrees Celsius (°C) must you raise the temperature?c. How much energy is required to heat the f
Answers
The thermometer measures the starting temperature as,
\(T_1=48^{\circ}F\)The temperature required for the boiling the water is
\(T_2=212^{\circ}F\)(a). The temperature requires to boil is,
\(\begin{gathered} T=T_2-T_1 \\ T=212-48 \\ T=164\text{ F} \end{gathered}\)In young's double silt experiment if the distance between the silts is 0.5 and the distance between the silts and screen is 2 times.Then what will be the width of bands
Answers
Answer: The width of bands will be 2λ
Explanation: Please see the attachments below
Whispering Gallery: A hall 100 feet in length is to be designed as a whispering gallery. If the foci are located 25 feet from the center, how high will the ceiling be at the center?
Answers
The height of the ceiling at the center of the whispering gallery is approximately 43.3 feet.
In an ellipse, the sum of the distances from any point on the ellipse to its two foci is constant. In this case, the two foci are located 25 feet from the center of the hall.
Given that the hall is 100 feet in length, the distance from one end to the center is 50 feet. We can consider this as the semi-major axis (a) of the ellipse.
The sum of the distances from any point on the ellipse to its two foci is equal to 2a. Thus, the sum of the distances from the ceiling at the center of the hall to the two foci is also 2a.
Since the foci are located 25 feet from the center, the sum of the distances is 2a = 50 feet.
To find the height of the ceiling at the center, we need to determine the semi-minor axis (b) of the ellipse. The semi-minor axis can be calculated using the formula:
b = √(a² - c²)
where c represents the distance from the center to each focus. In this case, c = 25 feet.
Substituting the values into the formula:
b = √(50² - 25²)
b = √(2500 - 625)
b = √(1875)
b = 43.3 feet
Therefore, the height of the ceiling at the center of the whispering gallery is approximately 43.3 feet.
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The populations P (in thousands) of a particular county from 1971 through 2014 can be modeled byP = 71.7e0.0345twhere t represents the year, with t = 1 corresponding to 1971.(a) Use the model to complete the table. (Round your answers to the nearest whole number.)YearPopulation1980101240 Correct: Your answer is correct.1990142949 Correct: Your answer is correct.2000201843 Correct: Your answer is correct.2010285000 Correct: Your answer is correct.(b) According to the model, when will the population of the county reach 350,000?2018 Incorrect: Your answer is incorrect.
Answers
ANSWERS
(a) Year - Population
• 1980 - 101,240
,• 1990 - 142,949
,• 2000 - 201,843
,• 2010 - 285,000
(b) 2016
EXPLANATION
(a) The population (in thousands) each year is given by,
\(P=71.7\cdot e^{0.0345t}\)If t = 1 represents year 1971, then for each year we have to find the difference between the year and 1970.
For year 1980,
\(P=71.7\cdot e^{0.0345(1980-1970)}\approx101.240\)The population is 101,240.
For year 1990,
\(P=71.7\cdot e^{0.0345(1990-1970)}\approx142.949\)The population is 142,949.
For year 2000,
\(P=71.7\cdot e^{0.0345(2000-1970)}\approx201.843\)The population is 201,843.
For year 2010,
\(P=71.7\cdot e^{0.0345(2010-1970)}\approx285.000\)The population is 285,000.
(b) In this problem we're given the population 350,000 and we have to find in what year the county will reach that population. In other words, we have to find t and then add that to 1970 to find the year.
Let's solve for t,
\(P=71.7\cdot e^{0.0345t}\)Divide both sides by 71.7,
\(\begin{gathered} \frac{P}{71.7}=\frac{71.7}{71.7}\cdot e^{0.0345t} \\ \frac{P}{71.7}=e^{0.0345t} \end{gathered}\)Apply natural logarithm to both sides,
\(\begin{gathered} \ln \frac{P}{71.7}=\ln e^{0.0345t} \\ \ln \frac{P}{71.7}=0.0345t \end{gathered}\)Divide both sides by 0.0345,
\(\begin{gathered} \frac{\ln \frac{P}{71.7}}{0.0345}=\frac{0.0345t}{0.0345} \\ \frac{\ln\frac{P}{71.7}}{0.0345}=t \end{gathered}\)And finally replace P and solve. Remember that P is in thousands of years, so we have to replace it by 350,
\(t=\frac{\ln \frac{350}{71.7}}{0.0345}=45.955\approx46\)This is 46 years after 1970,
\(1970+46=2016\)Let's see what's the population in 2016 to check the answer,
\(P=71.7\cdot e^{0.0345(2016-1970)}\approx350.546\)It is a bit more than 350,000. But let's see what's the population in 2015,
\(P=71.7\cdot e^{0.0345(2015-1970)}\approx338.658\)In 2015 population of the county won't reach 350,000. Thus, the county will have a population of 350,000 in 2016
Show the shifts that result from each of the following shocks. Then
use point E to identify the new short-run equilibrium. Where should
the E be placed
Answers
Shocks cause shifts in AD and AS curves, and the placement of point E, representing the new equilibrium, depends on these shifts.
Shocks can affect the economy through changes in aggregate demand or aggregate supply. An increase in aggregate demand would shift the AD curve to the right, reflecting higher overall demand for goods and services. This shift would result in a higher level of output and prices in the short run. Consequently, point E would be placed at a higher level of output and higher price level.
On the other hand, a positive supply shock, such as a decrease in production costs or an increase in productivity, would shift the AS curve to the right. This shift implies higher output and lower prices in the short run. In this case, point E would be located at a higher level of output and a lower price level.
Conversely, a negative supply shock, such as an increase in production costs or a decrease in productivity, would shift the AS curve to the left. The resulting equilibrium at point E would be characterized by lower output and higher prices in the short run.
To determine the placement of point E, it is necessary to identify the specific shifts caused by the shocks, such as an AD shift, a positive supply shock (AS shift to the right), or a negative supply shock (AS shift to the left). Once the shifts are identified, the corresponding changes in output and price level can be determined, and point E can be placed accordingly in the new short-run equilibrium.
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A fire helicopter carries a 590 kg bucket
at the end of a 12.7 m long cable. When
the helicopter is returning from a fire at a
constant speed of 33.7 m/s, the cable makes
an angle of 25.7
◦ with respect to the vertical.
25.7
◦
Find the horizontal force exerted by air
resistance on the bucket. The acceleration
due to gravity is 9.8 m/s
2
.
Answer in units of N
Answers
The horizontal force exerted by air resistance on the bucket is 5,210 N.
What is the horizontal force exerted by air resistance on the bucket?
The horizontal force exerted by air resistance on the bucket is the parallel force on the cable carrying the bucket.
The magnitude of this force is calculated as follows;
Fx = mg cosθ
where;
m is the mass of the bucketg is the acceleration due to gravityθ is the angle of inclination of the cableFx = (590 x 9.8) x cos(25.7)
Fx = 5,210 N
Thus, the horizontal force on the bucket is determined from parallel force on the rope.
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5. The Hall coefficient and conductivity of Cu at 400 K have been measured to be 0.45x10-10 m³/As and 6.5 /ohm-meter respectively. Calculate the drift mobility of the electrons in Cu.
Answers
The drift mobility of electrons in Cu is the ratio of the electric field to the charge carried by an electron and the time it takes for an electron to reach from one end of a conductor to the other under an applied electric field.
The Hall coefficient is defined as \(RH = (1/ne) * (dVH/dB)\) where n is the charge density, e is the charge of an electron, VH is the Hall voltage, and B is the magnetic field. To calculate the drift mobility of the electrons in Cu, we will first determine the charge density n using the Hall coefficient.
We can then use the conductivity and charge density to calculate the drift mobility. Given, Hall coefficient \(RH = 0.45 × 10^-10 m^3/A s\) and Conductivity \(σ = 6.5 /ohm\) meter at a temperature of 400K. (Magnetic field)
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what is the amount of energy needed to change a solid to a liquid at its melting point?
Answers
Heat of fusion latent The latent fusion temperature of a specific solid is the quantity of heat energy needed to transform 1 kilogram of solid into liquids at that solid's melting point.
What determines the energy required to transition from a solid to a liquid and from a liquid to a gas?Energy must be added to overcome the forces holding the particles together in order to transform a solid into a liquid and just a liquid into a gas. The strength of the connections binding the particles together determines how much energy is needed to change their state.
How can you figure out how much energy something needs to melt?Either Celsius degrees or Kelvin degrees might be used to indicate this. The formula for the quantity Q=mL Q=m L, where m represents the mass of the item and L is the latent fusion temperature for an opening or vaporization, determines the amount of heat necessary to change a material's phase.
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You arrive in science class 45 seconds after leaving math which is 90 meters to the south. What is your velocity?
Answers
Explanation: Well, If you arrive in my class 45 seconds after leaving math, which is 90 meters away. you traveled 2m/s ( I hope this helped <3)
Question 3 of 10
Why do electric charges that move through a magnetic field produce an
electric current?
A. The magnetic field exerts a force on only the negative charges in
the wire.
B. The magnetic field exerts a force on only the positive charges in
the wire.
C. The magnetic field pushes negative charges and positive charges
in the same direction.
D. The magnetic field pushes negative charges and positive charges
in opposite directions.
Answers
Answer: D
Explanation: a p e x :)
Answer:
B. The magnetic field pushes negative charges and positive charges in opposite directions.
A suspect isnleading the police on a car chase the officer reports that the suspect is traveling north at 100 miles per hour the officer has reported the suspects
Answers
Answer:
Velocity.
Explanation:
It is given that, the officer reports that the suspect is traveling north at 100 miles per hour. It means the suspect covers a distance of 100 miles every hour and moving in North direction.
It shows the velocity of the suspect. This is because his speed and direction are given. Velocity is a vector quantity.
So, the officer has reported the suspect's velocity.
Scientists can work in which of the following. Select all that apply.
Government
Universities
Business and industry
Medical Institutes
Answers
Answer: Universities
Business and industry
Medical Institutes
Explanation: I hope that helped
Answer:
I put government universities and medical instatutes.
Explanation:
this is the formula for calculating the diameter of an unknown microscope field.
Answers
By using this formula =Diameter = Diameter = Known Field Diameter × (Known Magnification / Unknown Magnification)
, you can calculate the diameter of an unknown microscope field, allowing you to estimate the size of the objects you're observing under different magnification levels.
.To calculate the diameter of an unknown microscope field, you can use the formula:
Unknown Field Diameter = Known Field Diameter × (Known Magnification / Unknown Magnification)
Here's a step-by-step explanation of the formula:
1. Determine the known field diameter: This is the diameter of the field of view under a certain magnification, which is usually provided by the microscope manufacturer or can be measured experimentally.
2. Determine the known magnification: This is the magnification level at which the known field diameter was measured.
3. Determine the unknown magnification: This is the magnification level at which you want to calculate the unknown field diameter.
4. Plug the values into the formula and solve for the unknown field diameter.
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pls help me w this, I've been doing this since 5 minutes ago
Answers
Answer:
t=0.0625s
Explanation:
F=number of swings/time taken
DATA
Frequency=4.0Hz
number of swings from Q to R
=1/4
time taken=?
Frequency=number of swings/time taken
make t the subject of the formula
t=n/f
substitute the given date
t=0.25/4.0
t=0.0625s
option A is collect
A downward electric force of 6. 0 N is exerted on a -7. 3 μC charge. ▼ Part A Find the magnitude of the electric field at the position of this charge. Express your answer to two significant figures and include the appropriate units. E = 1 μA Submit Value N с The value should be entered as a single number or in scientific notation. No credit lost. Try again. ? Previous Answers Request Answer
Answers
The magnitude of the electric field at the position of the charge is approximately 8.22 × 10^5 N/C.
How to determine the magnitude of the electric field at the position of the chargeTo find the magnitude of the electric field at the position of the charge, we can use the formula:
E = F / q
where E is the electric field, F is the force, and q is the charge.
Given:
Force (F) = 6.0 N
Charge (q) = -7.3 μC = -7.3 × 10^-6 C
Plugging these values into the formula, we get:
E = (6.0 N) / (-7.3 × 10^-6 C)
Calculating this value, we find:
E ≈ -8.22 × 10^5 N/C
Since the question asks for the magnitude, we ignore the negative sign and the final answer is:
E ≈ 8.22 × 10^5 N/C
So, the magnitude of the electric field at the position of the charge is approximately 8.22 × 10^5 N/C.
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