If an object moves in uniform circular motion in a circle of radius r = 1.00 meter, and the object takes 4.00 seconds to complete ten revolutions, calculate the centripetal acceleration. a = m/s2
a. 3.14 m/s2
b. 78.5 m/s2
c. 98.7 m/s2
d. 247 m/s2

Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2