Which of the following would decrease the mechanical advantage

A) a fulcrum

B) a fixed pulley

C) friction

D) heat

Wave C has an amplitude of 1 and wave D has an amplitude of 3 as shown below. What will happen when the trough of wave C meets the crest of wave D?

A sample of hydrogen gas will behave most like an ideal gas under the conditions of (1) low pressure and low temperature (2) low pressure and high temperature (3) high pressure and low temperature (4) high pressure and high temperature

A ball sitting on the top of a table has potential energy but no kinetic energy. How do potential and kinetic energy change as the ball falls off the table to the floor? A. Its potential energy increases, and its kinetic energy decreases. B.

А is a push or pull.

Two different sub-atomic particles are described below: Particle Y: Carries a positive charge Particle Z: Orbits the nucleus Which statement is true? Y is an electron and Z is a proton. Y is a proton and Z is an electron.

In which is momentum conserved: an elastic collision or an inelastic collision?

List the types of radiation in order from least to most damaging.

Which of the following statements best describes the current state of understanding regarding the apparent acceleration of the expansion of the universe?

Should young people be allowed to do extreme sports? (give me two reasons why) 1. Opinion: 2. Reason why: 3. Reason why:

A light ray is incident on a reflecting surface. If the light ray makes a "35°" angle with respect to the normal to the surface, what is the exact angle (in degrees) made by the reflected ray relative to the normal?