A ball with a mass of 5 kg is acted upon by a force of 20 N. If the ball begins moving from a velocity of 0 m/s and accelerates for 2 seconds, what is its change in velocity?

A. 0 m/s B. 2 m/s C. 4 m/s. D. 8 m/s

A monochromatic light beam with a quantum energy value of 3.0 ev is incident upon a photocell. the work function of the photocell is 1.6 ev. what is the maximum kinetic energy of the ejected electrons?

What are two ways you can change atomic mass

How long does it take to drive 2376 miles at 65mph?

Which of the following will not conduct an electrical current? a. pure water b. tap water c. aquarium water d. ocean water

If heat is transferred between two objects, what has to be true about the situation

The football player running toward the goal line has A. Potential energy B. Chemical energy C. Kinetic energy D. Elastic potential energy

If the density of an object is 30 g/cm3 and its volume is 10 cm3, what is its mass in grams?

Explain how atoms are aligned in a magnet in terms of the North and South poles.

Which of the following has the largest gravitational potential energy A. a 10kg dog running down the street at 30mph B. a tightrope walker slowly crossing niagara falls C. a 0.02kg bullet moving down the barrel at 800mph D.

Why does the speed of an object change when a force acts on it?