Answers
8n downwards
since downwards force is greater than upwards just minus
Related Questions
A circular loop (10 turns) with a radius of 29 cm is in a magnetic field that oscillates uniformly between 0.95 t and 0.45 t with a period of 1.00 s. assuming that the loop is perpendicular to the magnetic field, what is the induced emf in the loop? please show calculations
Answers
Finally, substituting the values into the formula for EMF:
EMF = -10 * [(Φ_max - Φ_min) / (1 s)]
How does the radius of the circular loop affect the induced EMF?The induced EMF in the circular loop, we can use Faraday's law of electromagnetic induction. The formula for induced EMF is given by:
EMF = -N(dΦ/dt)
Where EMF represents the induced electromotive force, N is the number of turns in the loop, and dΦ/dt is the rate of change of magnetic flux.
The magnetic flux through a circular loop of radius r in a uniform magnetic field B is given by:
Φ = BA
Where A is the area of the loop. In this case, A = πr² since the loop is circular.
Now we can calculate the magnetic flux at the maximum and minimum field strengths:
Φ_max = (0.95 T) * π * (0.29 m)²
Φ_min = (0.45 T) * π * (0.29 m)²
The rate of change of magnetic flux, we divide the difference in flux by the period:
dΦ/dt = (Φ_max - Φ_min) / (1 s)
Finally, substituting the values into the formula for EMF:
EMF = -10 * [(Φ_max - Φ_min) / (1 s)]
Calculate the values and substitute them into the formula to find the exact induced EMF.
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Compounds are made from the atoms of two or more______?
Answers
Answer:
elements
not really an explanation
All of the following are good conductors of heat exept
a. Wood
b. Aluminum
c. Copper Silver
(Sorry if its the wrong subject, Im not sure which science this is.)
Answers
Explanation; Wood is a poor conductor of heat (as well as other forms of energy) because it is covalently bound as a compound. As a result, it does not have the free electrons that scatter about to conduct different forms of energy like metals and other strong conductors do.
What does the power of a machine measure?
Answers
The power of a machine is the work/time ratio for that particular machine
Its the rate of doing work.
the conditions needed to produce a solar eclipse are a
Answers
The conditions necessary to produce a solar eclipse are the moon's position in relation to the sun and Earth, as well as the Earth's position in relation to the sun. A solar eclipse can only occur during a new moon and can be total, partial, or annular.
A solar eclipse is an occurrence when the moon transits between the sun and the Earth, blocking the sun's light and casting a shadow on the Earth's surface.
The conditions needed to produce a solar eclipse are the moon's position in relation to the sun and Earth, as well as the Earth's position in relation to the sun. A solar eclipse only occurs during a new moon when the sun, moon, and Earth are aligned in a straight line with the moon between the sun and Earth.
This occurs approximately twice a year. There are three types of solar eclipses: total, partial, and annular. In a total solar eclipse, the moon completely covers the sun's disk, causing a total blackout.
A partial solar eclipse occurs when the moon covers only a portion of the sun's disk. An annular solar eclipse occurs when the moon is at its farthest point from the Earth and appears smaller, creating a "ring of fire" around the sun.
For a solar eclipse to occur, the moon must be in its new phase, which means it must be on the same side of the Earth as the sun. During this time, the moon's shadow falls on the Earth's surface, creating a path of totality or partiality.
The path of totality is the area where a total solar eclipse can be observed, while the path of partiality is the area where a partial solar eclipse can be observed. In conclusion, a solar eclipse occurs when the moon passes between the sun and the Earth, casting a shadow on the Earth's surface.
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cientists have changed the model of the atom as they have gathered new evidence. One of the atomic models is shown below.
A purple ball in the center surrounded by overlapping concentric black ovals, each with a small green ball on each of the 6 ovals.
What experimental evidence led to the development of this atomic model from the one before it?
A few of the positive particles aimed at a gold foil seemed to bounce back.
The colors of light emitted from heated atoms had very specific energies.
Experiments with water vapor showed that elements combine in specific proportions.
Cathode rays were bent in the same way whenever a magnet was brought near them.
Answers
Answer:
A few of the positive particles aimed at a gold foil seemed to bounce back.
Explanation:
Answer:
The answer is A: A few of the positive particles aimed at a gold foil seemed to bounce back.
Explanation:
This is Bohr's model, and this is what his discovery was: that, when he conducted several experiments, he found that the positive particles bounced off of the gold foil.
I am 124% sure this is correctomundo!
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a boy pushes his little sister on a sled. the sled accelerates from 0 to 3.2 m/s . if the combined mass of his sister and the sled is 40.0 kg and 18 w of power were generated, how long did the boy push the sled?
Answers
The boy pushed the sled for 15 seconds. The Work-Energy theorem can be applied in circumstances when a rigid body must move while being subjected to several forces.
What is Energy Theorem?The Work - Energy theorem states that the work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle.
The Work-Energy theorem can be applied in circumstances when a rigid body must move while being subjected to several forces. A rigid body can only have kinetic energy because of its rigid structure, which prevents it from storing potential energy in its lattice.
The sled is initially at rest → initial velocity (u) = 0.
Final velocity (v) = 3.2 m/s
Mass of boy and sled (M) = 40 kg
Power developed (P) = 18 W = 18 Joules/sec
According to work - energy theorem -
Work done (W) = Δ E(K) = E(f) - E(i)
Therefore -
W=\((1/2*40*3.2*3.2-1/2*40*0)\)=204 joule
Now, Power is defined as the rate of doing work -
P =\(pw/dt\)= \(w/t\)
18 = 204/t
t = 15 seconds
Hence, the boy pushed the sled for 15 seconds.
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The boy pushed the sled for 15 seconds.
What is Energy Theorem?The Work - Energy theorem states that the work done by the sum of all forces acting on a particle equals the change in the kinetic energy of the particle.The Work-Energy theorem can be applied in circumstances when a rigid body must move while being subjected to several forces. A rigid body can only have kinetic energy because of its rigid structure, which prevents it from storing potential energy in its lattice.The sled is initially at rest → initial velocity (u) = 0.
Final velocity (v) = 3.2 m/s
Mass of boy and sled (M) = 40 kg
Power developed (P) = 18 W = 18 Joules/sec
According to work - energy theorem -
Work done (W) = Δ E(K) = E(f) - E(i)
Therefore -
\($$\mathrm{W}=(1 / 2 * 40 * 3.2 * 3.2-1 / 2 * 40 * 0)=204 \text { joule }$$\)
Now, Power is defined as the rate of doing work -
\(&\mathrm{P}=p w / d t=w / t \\\)
\(&18=204 / \mathrm{t} \\\)
\(&\mathbf{t}=15 \text { seconds }\)
Hence, the boy pushed the sled for 15 seconds.
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u drive for 30 min for 30 km east and then another 30 min for 40 km north. the magnitude of your average velocity for the entire trip is
Answers
Average speed is determined by dividing the whole distance you travelled by the total time, whereas average velocity is determined by your displacement line connecting your starting location and finishing point.
What is the magnitude of average velocity?To calculate the average velocity based on the displacement for the entire period taken. The displacement, which is the smallest distance between the initial and final points, is shown as the dash between the final point here and the dash between the starting point here.
And by using the bye to Chris rule, we can obtain this or dash. The route will therefore be 30 square plus 40 square, which equals 50 kilometres.
Therefore, 50 km divided by the total time represents the average speed in terms of magnitude. It has been an hour. And as a result, we are given the average velocity's magnitude as 50 km/h.
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Use the drop-down menu to identify the state of matter represented by each imagine.
A.
B.
C.
D.
Answers
Answer:
a: gas
b: solid
c: liquid
d: plasma
Explanation:
Answer:
Each image displays a different state of matter.
Use the drop-down menu to identify the state of matter represented by each image.
A:
✔ gas
B:
✔ solid
C:
✔ liquid
D:
✔ plasma
Explanation:
got it right
a ceramic rod that is 10 cm long has a thermal expansion coefficient of 8 x 10-5 °c-1. what percent strain elongation does the rod undergo when it undergoes a temperature increase of 1000°c?
Answers
0.8 percent strain elongation does the rod undergo when it undergoes a temperature increase of 1000°c
As per given information;
Thermal expansion coefficient = \(8\times10^{-5}\)°\(C^{-1}\)
The original length of the rod = 10 cm
change in temperature = 1000°c
The change in length of the ceramic rod ΔL can be calculated using the formula:
ΔL = α * L * ΔT
where:
α = thermal expansion coefficient
L = original length of the rod
ΔT = change in temperature
By placing in the values given in the problem,
we get:
ΔL = (\(8\times10^{-5}\)°\(C^{-1}\)) * (10 cm) * (1000 °C)
ΔL = 0.08 cm
By using the formula we can calculate the percent strain elongation (ε) :
ε = (ΔL / L) * 100%
where:
ΔL denotes a change in the length of the rod
L denotes the original length of the rod
By plugging in the values, we get:
ε = (0.08 cm / 10 cm) * 100%
ε = 0.8%
Therefore, the ceramic rod undergoes a percent strain elongation of 0.8% when it undergoes a temperature increase of 1000°C.
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3. Explain briefly how the temperature in a green house is kept higher than outside.
Answers
a crane uses a block and tackle to lift a 2000 N flagstone to a height of 30 m. How much work is done on the flagstone
Answers
The block and tackle system reduces the force required to lift the flagstone, while increasing the distance through which the rope must be pulled. The amount of force reduction depends on the number of pulleys in the system. Assuming that the block and tackle has a mechanical advantage of 4 (meaning that the force required to lift the flagstone is 1/4 of the weight of the flagstone), the tension in the rope will be:
Tension = Force required / Mechanical advantage
Tension = 2000 N / 4
Tension = 500 N
The work done on the flagstone by the crane is then:
Work = Force x Distance
Work = 500 N x 30 m
Work = 15,000 J
Therefore, the crane does 15,000 joules of work on the flagstone.
Una banda transportadora se utiliza para cargar canastos en un avión de carga, si µs = 0.5. ¿Cuál es el ángulo máximo de elevación para evitar el deslizamiento? Respuesta: 26.6
Answers
Water has a specific heat capacity of 4200 J/kg/°C. Calculate the temperature change produced when 0.35 kg of water is heated using 9600 J.
Answers
The temperature change produced when 0.35 kg of water is heated using 9600 J is 6.34 °C.
What is Specific Heat Capacity?
Specific heat capacity is the amount of heat energy required to raise the temperature of one unit of mass of a substance by one degree Celsius (or one Kelvin). It is a measure of the substance's ability to store heat energy. The specific heat capacity is a physical property of the substance and is usually denoted by the symbol c.
The amount of heat required to raise the temperature of a substance is given by the formula:
Q = mcΔT
where Q is the amount of heat energy transferred, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.
In this problem, we are given:
m = 0.35 kg (mass of water)
c = 4200 J/kg/°C (specific heat capacity of water)
Q = 9600 J (amount of heat energy transferred)
We can rearrange the formula to solve for ΔT:
ΔT = Q/(mc)
Substituting the given values, we get:
ΔT = (9600 J) / (0.35 kg x 4200 J/kg/°C)
ΔT = 6.34 °C
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sound caused by an explosion on the oceans surface travels vertically downward to an underwater mountain and is reflected back to a microphone at the surface. if this takes 11.6 s to occur and the sound travels 1450 m/s in water what is the depth to this mountain
Answers
The depth to this underwater mountain is 8410 m.
What is an echo?An echo is the sound heard after the reflection of the initial sound from a reflecting surface.
The echo time or the time taken for an echo to be heard is used to calculate the distance from the reflecting surface.
The Distance is of a place from the time taken to hear an echo is calculated as follows:
Distance = Speed * Time/2
Distance = 1450 * 11.6/2
Distance = 8410 m
Therefore, the depth to this underwater mountain is 8410 m.
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exmple of relative velocity
Answers
.
.
...
People also ask
What are some examples of relative motion?
Relative Motion refers to the motion or speed of any object in respect to a particular point. For example, a ball thrown upward while in a moving object such as a bus, would be traveling the same speed with respect to the bus and would fall again in relation to that speed.
Answer:
The example of relative velocity - a boat crosses a river that is flowing at some rate or an aeroplane encountering wind during its motion.
True/False? only hard scientists have the necessary skill set to respond to moments of crisis
Answers
The statement that only hard scientists has the essential skill set to respond in times of crisis is True.
What does highly essential mean?adjective. absolutely necessary; indispensable: Discipline is essential in an army. pertaining to or constituting the essence of a thing. noting or containing an essence of a plant, drug, etc. being such by its very nature or in the highest sense natural; spontaneous: essential happiness.
What does essential nature mean?meanings of essential and nature all the animals, plants, rocks, etc. in the world and all the features, forces, and processes that happen or exist independently of people, such as the weather, the sea, mountains, the production of young animals or plants, See more at nature.
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PLEAS HELPM ME FASTTT MARKING PERIOD IS ABOUT TO END.
Most areas have two high and two low tides each day, this is called ___________.
Question 2 options:
gravity
semi-diurnal
low tide
Answers
Answer:
the answer is semidiurnal
Answer:
I think it is semi-diurnal :)
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A sled is moving down a steep hill. The mass of the sled is 50 kg and the net force acting on it is 20 N. What must be done to find the acceleration of the sled? Check all that apply.
-The force of gravity must be broken into its parallel and perpendicular components.
-Acceleration can be found by dividing the net force by mass.
-Acceleration can be found by multiplying the net force by mass.
-The magnitude of the force components must be multiplied by gravity.
-Trigonometry can be used to solve for the magnitude of the force components.
-Net force must be found before acceleration can be found.
Answers
Answer:
-The force of gravity must be broken into its parallel and perpendicular components.
-Acceleration can be found by dividing the net force by mass.
-Trigonometry can be used to solve for the magnitude of the force components.
-Net force must be found before acceleration can be found.
Answer:
A, B, E, F
Hope this helps!!! :)
A vector is 253 m long andpoints in a 55.8 degreedirection.Find the y-component of thevector.
Answers
The components of the vector v are given as:
\(\begin{gathered} v_x=v\cos \theta \\ v_y=v\sin \theta \end{gathered}\)where v is the magnitude of the vector and theta is the angle.
In this case we have v=253 and theta=55.8°, plugging this values into the y component we have:
\(\begin{gathered} v_y=253\sin 55.8 \\ v_y=209.25 \end{gathered}\)Therefore the y component is 209.25 meters.
Why do some organisms never turn into fossils?
A. They are far too large to be buried in the ground.
B. They are made mostly of soft tissues.
C. They contain too much protein to be preserved.
D. They contain chemicals that prevent the hardening of their bodies.
Answers
Answer:
The answer is B.
Explanation:
Since they are made up of soft tissues, they decompose become they become fossils.
Which of the following units is a derived si unit (not one of the si base units)?
a. meter
b. kilogram
c. second
d. (newton)
Answers
Kilogram is the derived SI unit. Mole is NOT a subunit. Mole is one of the seven fundamental units. It is the SI base unit of substance amount.
The remaining six units are the second (time), the metre (length), the kilogram (mass), the ampere (current), the kelvin (temperature), and the candela (luminous intensity). The derived units are named after scientists, such as the hertz, watt, and coulomb. These units are denoted by the letters Hz, W, and C. Aside from meters per second, derived units include cubic meters and joules per kelvin. SI has seven base units upon which all others are based. The fundamental units are mass, length, time, temperature, substance amount, electric current, and luminous intensity.
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What is the name of the kind of stretch that involves stretching as far as you can and then holding for 10-30 seconds
Question 2 options:
PNF
ballistic
dynamic
static
Answers
Answer:
Static stretching.
Explanation:
It is static stretching because it is a form of stretching which u can do actively for a period of time and you hold position for about 30 to 60 seconds which allow the muscles and connective tissues to lengthen. It is done after work out with out movement in order to loosen up muscles so as to gain flexibility.
If the spring has a 5.5-newton mass attached to it and has a spring constant of 14 newtons per meter, how much will the spring stretch from equilibrium?
Answers
The extension of the spring from the equilibrium position, given that a 5.5 N mass is attached to the spring spring is 0.4 m
How do I determine the extension of the spring?From Hooke's law, we understood that the force, extension and spring constant are related according to the following formula:
Force (F) = Spring constant (K) × extension (e)
F = Ke
With the above formula, we can obtain the extension of the spring from it's equilibrium position. Details below:
Force (F) 5.5 NSpring constant (K) = 14 N/mExtension (e) = ?Force (F) = Spring constant (K) × extension (e)
F = Ke
5.5 = 14 × e
Divide both sides by 14
e = 5.5 / 14
e = 0.4 m
Thus, from above calculation, we can conclude that the spring will extend by 0.4 m from the equilibrium positon
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yo can anyone just report this cause I accidentally mean it a question, thxxx
Answers
The correct answer is 12x+7 as when you multiply these two numbers they cancel each other out
A family decides to travel from
Watsonville, CA to Guadalajara, Mexico
for the holidays. The family has to
travel 2,172 miles. The trip takes them a
total of 39.5 hours. What is their
velocity?
Answers
V=d/t
V=2,172 mi / 39.5 h
V=54.987 mi/h
calculate the wavelength (in m) of a 650.00 hz sound in air at room temperature and pressure, where the velocity of sound is 344 m/s.
Answers
The wavelength of a 650.00 Hz sound in air at room temperature and pressure, where the velocity of sound is 344 m/s, is approximately 0.529 m.
What is the wavelength of a 650.00 Hz sound in air at room temperature and pressure?Sound waves travel through a medium by creating compressions and rarefactions. The wavelength of a sound wave is the distance between two consecutive points that are in phase, such as two compressions or two rarefactions. To calculate the wavelength, we can use the formula: wavelength = velocity of sound / frequency.
In this case, the frequency of the sound is 650.00 Hz, and the velocity of sound in air at room temperature and pressure is 344 m/s. Plugging these values into the formula, we get: wavelength = 344 m/s / 650.00 Hz = 0.529 m.
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1.An aardvark is driving a sailboat, and at the end of his first 50 meters he is traveling 30 m/s. He then uniformly accelerates at 3 m/s2 for 30 seconds. How far will the aardvark have traveled total after the 30 seconds of acceleration?
2.A school bus in about 1 decameter long. How many centimeters is this?
3.If I drop a rock off a 25-meter-high roof, how long will it take to fall to the bottom?
4.A ball is kicked off the ground and it takes 2.5 seconds for it to reach it’s maximum height. What is the hang time of the ball?
Answers
Answer:
See below
Explanation:
1)
df = do + vo t + 1/2 a t^2 df = final distance
do = original distance ( FIFTY in this case) vo = original velocity
df = 50 + 30 (30) + 1/2 (3)(30^2) = 2300 m
2) a deca meter is 10 meters , each meter is 100 cm 100 x 10 = 1000 cm
3) for this case df = 1/2 at ^2 ( see equation in answer 1 ===> do and vo are both = 0) 25 m = 1/2 (9.81) t^2 shows t = 2.26 s
4) Ignoring air friction, the time to reach max height is the time it takes to come back down
2.5 + 2.5 = 5 s
If an aardvark is driving a sailboat, and at the end of his first 50 meters he is traveling 30 m/s. He then uniformly accelerates at 3 m/s2 for 30 seconds, the aardvark has traveled a total distance of 2300 meters after the 30 seconds of acceleration.
What are the three equations of motion?There are three equations of motion given by Newton ,
v = u + at
S = ut + 1/2×a×t²
v² - u² = 2×a×s
As given in the problem, the aardvark is driving a sailboat, and at the end of his first 50 meters, he is traveling 30 m/s. He then uniformly accelerates at 3 m/s2 for 30 seconds.
S = ut + 1/2 ×a×t²
S = 30 × 30 + 0.5 × 3 × 30²
S = 2250
Total distance = 50 + 2250
= 2300 meters
Thus, the total distance covered after 30 seconds would be 2300 meters.
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7. Our state of mind affects how we observe our surroundings. What
mental state is the best for observing?
I
a) happy
c) nervous
b) relaxed d) excited
Answers
Which of these words describes a chemical property of gold?
A. Shiny
B. Insoluble
C. Inert
D. Malleable
Answers
Answer:
D. Malleable
Explanation:
Gold is metallic, with a yellow colour when in a mass, but when finely divided it may be black, ruby, or purple. It is the most malleable and ductile metal; 1 ounce (28 g) of gold can be beaten out to 300 square feet. It is a soft metal and is usually alloyed to give it more strength.