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xenn [34]
3 years ago
14

A bus makes a 10-kilometer journey through town. It's top speed is 50 km/h and it's mean speed is 16kn/h. Explain why these spee

ds are different.
Somebody pls help me with this question!
Physics
1 answer:
Maru [420]3 years ago
6 0

Answer:

speed are different at different places

Explanation:

because it's top speed is 50km/h,so it's initial speed may be less. when it covers some distance it's speed changes again. then we have given a mean speed .mean speed means sum of all speed divided by sum of total time.so the mean speed and final speed differs from each other

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mars1129 [50]

Answer: 300 turns

Explanation: In order to explain this problem we have to consider the relationship between the voltage for the primiry and secondary and the turns for their coils.

This expression is consequence of the Faraday law because the magnetic flux is the same for both coils then the induced emf are the same for both circuits.

They are reñated as follow:

Vs=Vp*Ns/Np  where Vs and Vp are the voltage for the secondary and primary coil, respectively.

Ns and Np are the turns for the secondary and primary coil, respectively.

Then we have:

Ns=Vs*Np/Vp= 16*2250/120=300

7 0
3 years ago
A ball is rolled at an initial speed of 5 m/s and finishes a certain distance at a speed of 7 m/s. if the ball rolled for 9 seco
Setler79 [48]

Answer:

The ball rolled a distance of 54 m.

Explanation:

Given:

Initial velocity of the ball is, u=5\ m/s

Final velocity of the ball is, v=7\ m/s

Time for rolling is, t=9\ s

The distance of rolling is, S=?

First, let us find the acceleration of the ball using Newton's equation of motion as:

v=u+at\\a=\frac{v-u}{t}\\a=\frac{7-5}{9}=\frac{2}{9}\ m/s^2

Now, displacement of the ball can be determined using the following equation of motion:

v^2=u^2+2aS

Rewriting the above in terms of 'S', we get

S=\frac{v^2-u^2}{2a}

Plug in the known values and solve for 'S'. This gives,

S=\frac{7^2-5^2}{2\times \frac{2}{9}}\\\\S=\frac{49-25}{\frac{4}{9}}\\\\S=\frac{9\times 24}{4}\\\\S=9\times 6=54\ m

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3 0
4 years ago
limestone chips dissolve after they are placed in a beaker of dilute acid. Which geologic process is this most similar to?
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3 years ago
A tiger started running when it saw a deer running at uniform velocity 2m/s at 15m far from it ..if the tiger ran at acceleratio
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The position x for the tiger with a constant acceleration a is given by:
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x = vt + x_0, x_0 = 15m

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3 years ago
You use sunglasses to reduce the glare of the sun when you go outside. You are taking advantages of light’s ability to do which
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 to polarize the sun brightness
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