The speed of sound at high altitudes, where the air is less dense, is greater than the speed of sound at low altitudes, where the air is more dense.

Which statements accurately describe Earth's magnetic field? Check all that apply.

Newton's second law states that the force on a drag racer is equal to the mass of the car times its acceleration. one of the most important factors determining the cars acceleration is the tires on the car.

The energy of microwaves is less than the energy of ultraviolet light. Which comparison of the energies of electromagnetic waves is correct? X-rays have lower energy than gamma rays because X-rays have higher frequencies.

You are given this hypothesis: ñif beans are grown in soil with compost, then they will grow at the same rate as beans grown in soil without compost because compost has no effect on the growth rate of beans.

Dust settling out of the air chemical change or physical change

Why fan rotates in a clockwise direction and why not in a anti clockwise direction

If the force of gravity increases, which mearsurement will change and how? A.) weight decreases B.) mass increases C.) mass decreases D.) weight increases

A 6.0 kg box slides down an inclined plane that makes an angle of 39° with the horizontal. If the coefficient of kinetic friction is 0.19, what is the magnitude of the acceleration, in m/s2, of the box down the slope?

Identify the following as a suspension or a colloid. sand in water

A cyclist starts at a position of 0 m and takes 3 s to move east to a position of + 8 m. He then cycles west to a position of + 5 m which takes an additional 2 s. What is the cyclist's displacement? a. + 11mb. - 8mc. - 5m d. + 5m