A(n) 0.49 kg softball is pitched at a speed of20 m/s. The batter hits it back directly at thepitcher at a speed of 25 m/s. The bat acts onthe ball for 0.012 s. What is the magnitude of the impulse imparted by the bat to the ball? Answer in units of M/s.

An engineer designs a roller coaster so that a car travels horizontally for 152 ft, then climbs 137 ft at an angle of 34.0° above the horizontal. it then moves 137 ft at an angle of 48.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

The vapour pressure of benzene is 53.3 kpa at 60.6 °c, but it fell to 51.5 kpa when 19.0 g of a non-volatile organic compound was dissolved in 500 g of benzene. calculate the molar mass of the compound.

By what primary heat transfer mechanism does the sun warm the earth?