A helicopter flies 250 km on a straight path in a direction 60° south of east. The east component of the helicopter's displacement is

A 2kg ball is rolled at 3m/s. What is the KE of the ball?

Where do earthquakes come from?

400.0 mL of a gas is collected at 745.0 mm Hg. What will the volume be at standard pressure (Std pressure = 760.0 mm Hg) ?

A heavy rope, 80 ft long and weighing 32 lbs, hangs over the edge of a building 100 ft high. how much work w is done in pulling the rope up 20 ft?

A batter hits a pop up straight up over home plate at a initial velocity of 25m/s. The ball is caught at the same height that it was hit.

Ilya and Anya each can run at a speed of 8.00 mph and walk at a speed of 3.20 mph. They set off together on a route of length 5.00 miles.

Jill is getting ready to push little Frank in his swing. She pulls Frank back as high as she can and then releases the swing. What is the initial transfer of energy that accelerates the swing when she lets go?

Which phenomenon generates electric current? A black body radiation B ultraviolet catastrophe C emission spectra D photoelectric effect

What is the product of 3.15 m and 2.006 m with the correct number of significant figures?

Consider what happens at the moment when the block leaves the surface of the globe. Which of the following statements are correct? - The net acceleration of the block is directed straight down.