All reactions require activation energy.

a. True

b. False

This law states that a planet's elliptical orbit around the Sun sweeps equal amounts of area in an equal amount of time. This means that each planet travels faster near the Sun and slower farther from it. A. law of ellipses B. law of inertia C.

During fabrication processes, polymeric materials are generally subjected to which of the following conditions? The ambient temperature. Elevated temperatures. The ambient pressure. Elevated pressures.

Assuming all objects are moving with the same velocity, which statement describes the object with the smallest inertia? A driver continues forward after his car takes a sharp turn. A bowling ball rolls across a street and into a large soccer field.

What is it called when matter changes directly from a solid to a gas?

Explain how some traits are inherited

A two stage rocket leaves its launch pad moving vertically with an average acceleration of 4 m/s2. at 10 s after launch the first stage of the rocket (now without fuel) is released.

A liquid filled sealed system has cylinders with movable pistons on each end. The face of one piston has an area of 5 cm². The other piston has an area of 500 cm² and is supporting a weight of 2 kN on it.

A turntable is spinning on a frictionless axle when a ball of putty is dropped onto it from above. The putty sticks to the turntable when it lands. Is angular momentum conserved for the turntable and putty (the system) during this process?

A cheetah can run from 0 to 70 mph in 2.2 seconds. what is the cheetah's top speed in m/s?

Which statement about how light travels is true? A Light waves need a medium to travel, and they travel at the same speed even if the light source is moving.