Write an expression for the instantaneous voltage delivered by an ac generator supplying 120 v rms at 60 hz. assume the voltage is 0 at time =0, and leave the factors in exact form; do not round their values. write the argument of the sinusoidal function to have units of radians, but omit the units.

How many seconds does it take a pebble released from rest off a bridge to fall 29.4 m ? what is the pebble's speed when it has fallen 29.4 m ?

Apossible explanation for a set of facts that can be tested by further investigation is called

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.