A substance that accelerates the rate of a chemical reaction is called a (an)

a. catalyst.

c. molecule.

b. lipid.

d. element.

To measure the acceleration due to gravity on a distant planet, an astronaut hangs a 0.070-kg ball from the end of a wire. The wire has a length of 1.5 m and a linear density of 3.10 10-4 kg/m.

Which of the following can Sierra use to describe the relationship between ΔL and Young's modulus?

When work is done and a force is transferred which choice describes the movements of the object?

When a listener moves toward the source of a sound wave, the compressions of the wave are spread out. Question 19 options: True False

You are given a marble by your instructor and are asked to measure its density. Unfortunately, marbles roll when placed on a balance pan, so you decide to use a beaker to hold the marble while you measure its mass. An empty beaker has a mass of 31.

V=345m/s, 7210Hz, X=?

As a mercury atom absorbs a photon of energy, an electron in the atom changes from energy level d to energy level e. Determine the energy of the absorbed photon in electronvolts.

During an exothermic reaction, the energy given off comes from atoms being consumed mass being burned into energy the breaking and forming of bonds mass being created

Can electrostatic attract both pull and pull?

Ways that charges can be transferred