You’re using a magnifying glass of focal length f (f > 0) to read a telephone book. How far from the page should you hold the lens in order to see the print enlarged 3×?

Aspring with a mass of 2 kg has a damping constant 14 kg/s. a force of 3.6 n is required to keep the spring stretched 0.3 m beyond its natural length. the spring is stretched 0.6 m beyond its natural length and then released. find the position of the mass at any time t. (assume that movement to the right is the positive x-direction and the spring is attached to a wall at the left end.)

Which statement is true for light passing into a medium that is more optically dense than the first medium through which it past

What is tan(61)? а. 1.80 b. 0.49 c. 0.61 d. 0.87