Correct answer will receive a Brainliest. 4. The period of a pendulum is 1.4 seconds. The length of the pendulum is increased by a factor of 4. What is the new period of the pendulum?
O A 0.7 seconds
OB. 1.4 seconds
O C.2.8 seconds
OD. 5.6 seconds

C

Explanation:

The period of a pendulum is found by the equation: T = 2pi*sqrt(L/g). Let the original length be L and the original period be T. The length increased by a factor of 4, so it’s new length is 4L. We get that the new period is 2pi*sqrt(4L/g) = 2pi*2sqrt(L/g) = 4pi*sqrt(L/g). We can see that the period increased by a factor of 2 because the original period, T, equals 2pi*sqrt(L/g) and the new period is 4pi*sqrt(L/g) = 2(2pi*sqrt(L/g)) = 2T. Therefore, the new period is 2(1.4) = 2.8

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the part of the wave he is travelling on is the crest

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