Acceleration occurs when an object changes

The manufacturer of a bulletproof vest wants the vest to be able to stop a bullet with a mass of 0.4 kg and a velocity of 1800 m/s. what is the momentum of this bullet? a. 720 kg*m/s b. 740 kg*m/s c. 820 kg*m/s d. 4500 kg*m/s

Jerri is planning to rebuild the engine of an antique car. She has chosen all the materials she needs including a high quality synthetic oil to reduce friction in the engine. What effect will reducing friction have on the engines performance?

Describe three pieces of evidence that support the Big Bang theory

The force P is applied to the 59-kg block when it is at rest. Determine the magnitude and direction of the friction force exerted by the surface on the block if (a) P = 0, (b) P = 198 N, and (c) P = 288 N.

Describe how atoms and elements are related

When light bounces off a surface, which component will be reflected more - the component that is parallel to the surface, or the component that is perpendicular to the surface, and why?

What is 18 degrees celsius in fahrenheit?

A small object moves along the x-axis with acceleration ax (t) = - (0.0320m/s3) (15.0s-t). At t = 0 the object is at x = - 14.0 m and has velocity v0x = 8.90 m/s. What is the x-coordinate of the object when t = 10.0 s?

Nitrogen and Hydrogen react to form ammonia (NH3). The reaction looks like this: Ammonia What is the ratio of nitrogen atoms to hydrogen atoms in ammonia? 1 to 2 1 to 3 2 to 1 3 to 1

Place the following types of electromagnetic radiation in order of increasing wavelength. ultraviolet light gamma rays radio waves Place the following types of electromagnetic radiation in order of increasing wavelength.