The amplitude of a compressional wave depends on the

a.) density of material in compressions and rarefactions
b.) distance between crests and troughs
c.) number of wavelengths that pass by a point each second
d.) vibration of electric and magnetic parts

Agroup of monkeys is trying to cross the river in a rowboat. the maximum buoyant force on the rowboat is 2,000 n. the weight of the rowboat is 1,000 n. each monkey has a weight of 150 n. how many monkeys can safely cross in the rowboat at one time? explain your reasoning, including any calculations you used to find the answer.

An impulse is the product of the on an object and time during which it is applied

The doctor lands his tardis on a planet whose radius is 1.2x10^7m the acceleration due to gravity is 18m/s^2. what is the mass of the planet