Asmall marble attached to a massless thread is hung from a horizontal support. when the marble is pulled back a small distance from equilibrium and released, it swings in simple harmonic motion with a frequency .
what is the frequency of the pendulum if the length of the thread is increased by a factor of 4,4, but the marble is still released in the same way?
a,
b.

f' = 2 f

Explanation:

The frequency of the pendulum that swings in simple harmonic motion is given by :

Where

l is the length of pendulum

g is the acceleration due to gravity

If the length of the thread is increased by a factor of 4, such that, l' = 4 l, let f' is the new frequency such that,

f' = 2 f

So, the new frequency of the pendulum will become 2 time of initial frequency. Hence, the correct option is (b) "2f"

answer: d. a cme increases the amount of energy in the solar wind

explanation:

coronal mass ejections, also called cmes, are large clouds of plasma and magnetic field that erupt from the sun. only when the cloud is aimed at earth will the cme hit earth and therefore cause impacts. high-speed solar wind streams come from areas on the sun known as coronal holes.