List and define three types of intermolecular forces and identify which types of molecules each forces affects.

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.

What is the weight of a feather (mass = 0.0001 kg) that floats through earth's and the moon's atmospheres?

At what time will the interfering waves have an amplitudeof zero?