In a performance test, each of two cars takes 8.4 s to accelerate from rest to 27 m/s. car a has a mass of 1374 kg, and car b has a mass of 1876 kg. find the net average force that acts on (a) car a and (b) car b during the test.

Which one of the following environments will sound not travel through? A. Solid B. Gas C. Liquid D. Vacuum

What happens when light rays incident on a convex mirror run parallel to its principal axis?

Radiant energy is a form of ... A. kinetic energy only. B. neither potential nor kinetic energy. C. potential energy only. D. both potential and kinetic energy.

A motorcycle stunt driver zooms off the end of a cliff at a speed of 30 meters per second. If he lands after 0.75 seconds, what is the height of the cliff? a. What do you know? b. What do you need to solve for? c. What equation (s) will you use? d.

Scientific models can be used for a variety of different purposes. Which of the following is not a possible use for a scientific model?. a. study of complex systems. b. study of obsolete systems. c. replace study of the larger system. d.

What's the definition of: • cellular respiration • photosynthesis

What are the steps that are important to take for your safety during an earthquake? a. stay away from walls and windows c. stay away from electrical and gas lines b. get under a desk or table d. all of the above

You have an open air column of length 1.40 m in air at 24.2 °C. What is the frequency of the third harmonic?

Why do we use average force while solving momentum problems? How is net force related to the momentum of the object?

If you had a positive 8 score on the sit-an-reach test you