What body part plays a strong role in releasing power

An object is 10 cm from the mirror, its height is 1 cm and the focal length is 5 cm. what is the image height? (indicate the object orientation by including the + or - sign with the answer.) hi = cm +1 -1 +10 -10

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?