Positive acceleration is the rate at which an object is a) slowing down
b) speeding up
c) going backwards

Amachine, modeled as a simple spring-mass system, oscillates in simple harmonic motion. its acceleration is measured to have an amplitude of 5,000 mm/s with a fre- quency of 10 hz. compute the maximum displacement the machine undergoes during this oscillation.

Which of the choices below is one of the primary gases found in the atmosphere? a. helium b. carbon dioxide c. nitrogen d. argon

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of