Why is gravity considered a force?

You have a beaker with a layer of olive oil floating on top of water. A ray of light travels through the oil and is incident on the water with an angle of 50.2°. Using the index of refraction of the oil as 1.

We always see the same side of the Moon because Choose one:A. the Moon does not rotate on its axis. B. the Moon rotates once each revolution. C. when the other side of the Moon is facing toward us, it is unlit. D.

What is the absolute value of the horizontal force that each athlete exerts against the ground?

Nuclear power plants produce useful energy by controlling the process of? A. Cold fusion B. Nuclear fusion C. Binary fission D. Nuclear fission

An ocean wave is an example of

Which of the following is a vector quantity? A. 83 ounces of liquid B. 55 km/hr in a truck C. 15 seconds of travel D. 10 m/s down

Which of the following best describes the ultraviolet catastrophe of blackbody radiation? A. As energy is added to an object acting as a blackbody radiator, its emissions move to the ultraviolet part of the electromagnetic spectrum. B.

Is an engine-activated booster unit that reduces the effort required to apply the hydraulic brakes

A box is lowered using a rope. If the acceleration of the box, is 2.5 m/s2 (downward) and the tension in the rope is 31 N, what is the mass of the box (in kg) ?

On a very hot summer day, the rooms on the first floor of a house stay cooler than the rooms on the second. Which form of thermal energy flow causes this to occur? A) Conduction B) Convection C) Kinetic D) Radiation