A train moves from rest to a speed at 25m/s in 30.0 seconds. What is it's acceleration?

A 90kg cannon fires 100kg shell with muzzle velocity of 75m/s. Calculate the recoil velocity of the cannon relative to the ground

The tip of a triangle is held 12.0 cm above the surface of a flat pool of water. A submerged swimmer in the pool sees the tip of the triangle at what distance above the water? Let the indices of refraction nwater = 1.33 and nair = 1.00.

Which bird on the wire, the one with a mass of 50g or the one with a mass of 60g, has the most potential energy?

Which of the following is an example of the absolute threshold? a. Dimitri turns down the shower because it is too hot. b. Sam recognizes that the restaurant lights have suddenly dimmed. c.

An 80 kg skydiver is falling at terminal velocity. What is the value of air resistance acting on his body? Consider, what are the knowns and unknowns?

Imagine two starts are exactly the same size, but one of the stars to greater mass than the other. which star will burn out all of its fuel first

How many eclipses normally occur each year? a. 2 b. 5 c. 7 d. 4

At what distance from equilibrium is the energy of a sho half kinetic and half potential?

Why can you not measure the volume of water in the measuring cylinder accurately unless you look straight at the scale?

How can biologic weathering result in chemical weathering? A. Bacteria release acids and other agents that break down rock B. Large herds temple rocks and break up soil C. Root loosen soil and break rock