3 years ago

I’ll mark brainliest just answer ASAP

1 answer:

6 0

C.) During a Spring Tide

This is because there is a greater difference in the high and low tides, causing the water to flow longer through the turbine

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24. While measuring the length of a book, the reading of the scale at one end is 5.0 cm and at the other end is 20.5

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Suppose a moving car has 2000 J of kinetic energy. If the carʹs speed doubles, how much kinetic energy would it then have?

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Answer:

option A

Explanation:

given,

Kinetic energy of the car = 2000 J

speed of the car is doubled

we know,

$KE_1 = \dfrac{1}{2}mv^2$

$2000= \dfrac{1}{2}mv^2$ ........(1)

now, speed of the car is doubled

v' = 2 v

$KE_2 = \dfrac{1}{2}mv'^2$

$KE_2 = \dfrac{1}{2}m(2v)^2$

from equation (1)

$KE_2 = 4\times \dfrac{1}{2}m(v)^2$

$KE_2 = 4\times 2000$

$KE_2 = 8000\ J$

Hence, the Kinetic energy would be equal to 8000 J.

The correct answer is option A.

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Why do we close our eyes when we sleep

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