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Svetlanka [38]
3 years ago
7

3. A train covers 168 km in 4 hours. How much distance will it cover in 80 minutes?

Physics
1 answer:
Kay [80]3 years ago
4 0

Answer:

56km

Explanation:

168 ÷ 240 = 0.7

0.7 × 80 = 56km

240 is the amount of minutes in 4 hours.

We divided 168 by 240 to get the distance covered in 1 minute. Afterwards, we needed 80 minutes so we multiplied the answer by 80.

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sertanlavr [38]

Part a)

As we know that energy stored inside the capacitor is given as

U = \frac{1}{2}CV^2

for a given capacitor we know

Q = CV

Now we can use it in above equation to find the energy

U = \frac{1}{2}QV

U = \frac{1}{2}(3.4\times 10^{-6})(24)

U = 40.8\times 10^{-6} J

PART b)

If two negative charges are hold near to each other and then released

Then due to mutual repulsion they start moving away from each other

Due to mutual repulsion as the two charges moving away the electrostatic potential energy of two charges will convert into kinetic energy of the two charges.

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Part c)

As we know that capacitance is given as

C = \frac{Q}{V}

here we know that

Q = 3\times 10^{-10}C

V = 35 volts

C = \frac{3\times 10^{-10}}{35}

C = 8.6 \times 10^{-12} F

5 0
3 years ago
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Alik [6]

Answer:

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Explanation:

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3 years ago
Write the total equation for the proton-proton chain reaction that takes place in stars?
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Answer:

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