You look at the closed beach from a distance and observe that 3 waves hit 2 points
the beach each second. What is the period of the wave? *
O
1/3 Seconds
O 1/3 Hz
O 3 Hz
3 Seconds

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

An open cart is moving along a straight frictionless horizontal track. when rain starts falling vertically into the cart, what happens to the speed of the cart?

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false