An object moves with simple harmonic motion. if the amplitude and the period are both doubled, the object's maximum speed is 1. quartered 2. halved 3. quadrupled. 4. doubled 5. unchanged

The object's maximum speed remains unchanged.

Explanation:

The speed of a particle in SHM is given by :

Maximum speed is,

If A' = 2A and T' = 2T

So, the maximum speed of the object remains the same i.e. it remains unchanged. Hence, this is the required solution.

what is the actual question though?

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.