A 20-kilogram box is sitting on an inclined plane with a 30-degree slope. If the box is at rest, what is the force

on the box due to friction?

1. A certain atom has 20 electrons, 21 neutrons, and 20 protons. What is the atomic mass of the atom?

A student used a yardstick to model elastic rebound. The student bent the stick without breaking it and then let the stock go. What does the bent stick represent in the student's model? A. The Rock's original shape B. A siesmic wave C.

Describe how sound from radio reaches all parts of them room

The density of water at 0ºC is very nearly 1000kg/m3 (it is actually 999.84 kg/m3), whereas the density of ice at 0ºC is 917 kg/m3.

Which of the following devices is associated with the reception of radio signals?

How far will a ball travel that goes 35 meters per second for 18 seconds?

a 5.00 kg ball accelerates at a rate of 2.00 m/s squared for 1.50 seconds. calculate the balls momentum after the acceleration

An ice cube is dropped into a glass of water. Describe the motion of the ice cube and explain why it moves this way

How does the overtone number relate to the standing wave pattern number

Which of the following statements about Em waves is true? A. Em waves all have the same speed B. Em waves all have the same wavelength C. Em waves only travel through water D. Em waves all have the same amount of energy