Which of the following is not a characteristic of electromagnetic waves? (A) They can travel at various speeds through any one material. (B) the can be refracted. (C) They can be reflected. (D) They can travel through a vacuum.

What type of wave is sound

Forces of attraction limit the motion of particles most in

A ball is thrown vertically upward with a velocity of 115m/s. Show work A) To what height will the ball rise? B) How long will it take to fall back to earth?

How much time will it take a car traveling at 88 km/hr (55 mi/hr) to travel 500 km?

Which of the following is an example of a contact force? Gravity Magnetic force Electrical force Air resistance

Is the following sentence true or false? Two atoms of the same element can have different numbers of protons.

Definition of mechanical weathering

If you double the force of an object what happens to the acceleration?

A particle (mass - 5 g. charge 30 mC) moves in a region of space where the electric field is uniform and is given by Ex 4.8 N/C, Ey-E. 0. If the velocity of the particle att-O is given by v,-40 m/s V, v-0, what is the speed of the particle at t3 s?

When the Egyptians noticed this celestial body rising before the Sun it indicated to them the coming of the Nile flood.