Identify the type of friction in each situation described below: a. Two students are pushing a box that is at rest
b. The box pushed by the students is now sliding
c. The students put rollers under the box and push it forward

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

Carbon-14 is a radioactive element that undergoes beta decay. which force is responsible for allowing carbon-14 to become stable? electromagnetic gravitational weak nuclear strong nuclear

An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. what other characteristic does the radiation have?