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

a. catalyst.

c. molecule.

b. lipid.

d. element.

An electric appliance draws 1.5 amperes of current when it is connect 24-volt source. What is the resistance of this appliance? (5F) F 0.063 ohm G 11 ohm H 16 ohm 54 ohm

Determine the type and degree of each of the following expressions 9x^4 y^9 x^4-3x^2+7x^5 19a^6b^2 + 8ab^3c - 27a^7

Calculate how much an astronaut with mass of 90 kg would weigh while standing on the surface of Mars. The acceleration due to gravity on Mars is approximately 3.7 m/s^2. Express your answer in Newtons. Show your work

The depth of the Hoover dam is 220m. What is the water pressure at the base of the dam?

Kenneth ran a marathon (26.2 miles) in 5.5 hours. What was Kenneth's average speed? (Round your answer to the nearest tenth.)

A person with his ear to the ground, sees a huge stone strikethe concrete pavement. A moment later two sounds are heard from theimpact: one travels n the air and the other in the concrete, andthey are 2.2 s apart.

An athlete on a sled is moving with a speed of 3.0 m/s across a pond covered with ice. If the total mass of the sled-athlete system is 95.0 kg, what magnitude of the average force is required to bring the sled to rest in 15.0 s

What device is used for side mirrors on automobiles

In order for an object to accelerate, what must be applied?

The switch S is closed at t = 0 (assume that the battery voltage remains constant at 10V and the resistance of the inductor is negligible).