You experience night-time when:

a. the side of the Earth you occupy is facing away from the Sun.

b. the Earth revolves 90 degrees in its orbit.

c. the Moon blocks the Sun's light.

d. the Earth's axis precesses.

Gustavo and Beatriz are pushing on a door in opposite directions. If the door does not move, the forces are. The net force in this scenario would be

Two forces present in projectile motion are: a. Gravity and acceleration b. Gravity and initial forward velocity c. Gravity and air resistance d. Gravity and weak nuclear force

What will a spring scale read for the weight of a 75.0-kg woman in an elevator that moves upward with constant speed of 5.8 m/s?

A 6110-kg bus traveling at 20.0 m/s can be stopped in 24.0 s by gently applying the brakes. If the driver slams on the brakes, the bus stops in 3.90 s. What is the average force exerted on the bus in both these stops?

Which of the following solids will have the highest wave speed? A. One that has a high level of stiffness combined with a low density B. One that has a low level of stiffness combined with a low density C.

A roller coaster has a mass of 500 kg. It drops from rest at the top of a hill that's 57 m tall. How fast is it going when it reaches the bottom? Acceleration due to gravity is g = 9.8 m/s2.

Two sinusoidal waves are moving through a medium in the positive x-direction, both having amplitudes of 7.00 cm, a wave number of k=3.00m-1, an angular frequency of ω=2.50s-1, and a period of 6.00 s, but one has a phase shift of an angle ϕ=π12rad.

For a vacation, you and your family fly east to west from Boston, Massachusetts, to Seattle, Washington. You notice that your flight back home to Boston is shorter than your flight to Seattle. Which phenomenon causes your flight home to be shorter?

You spy on an anchor on the bottom of a lake. What is the direction and amount of force the water exerts on it: a) zero b) up, equal to the weight of the anchor. c) up, less than the weight of the anchor d) down, equal to the weight of the anchor.

How are electromagnetic waves different from matter waves?