If the mass of the helicopter is 4500kg, and the net force on it is 18,000 N, what is the helicopter's acceleration?

Light hits a flat white wall. Which of the following choices correctly describes the interaction between light and the wall?

Why might farmer plant purebred crop seeds?

What would happen if the earth mass increase

Describe how a change in the geosphere affect the biosphere?

An electron in the n = 7 level of the hydrogen atom relaxes to a lower energy level, emitting light of 397 nm. what is the value of n for the level to which the electron relaxed?

For each of the following, describe the relationship as directly or inversely proportional: a) wavelength vs. frequency b) wavelength vs. energy c) frequency vs. energy ... ?

Can hand sanitizer be used as rubbing alcohol

Two objects experience a 12 N electrical force between them. What force will the objects experience if the distance between them is doubled?

a submarine moving directly upward in the water at constant speed. The weight of the summer and it is 500,000 N. The submarines motors are off. The magnitude of the buoyant force acting on the submarine is

If the car went 30 km west in 25 min. and then 40 km east in 35 min., what would be its total displacement?