a car is cruising on a highway at 30.0m/s. the engine is applying force on 75.0N what is the force of friction? solve using g = 10m/s

Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?

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