A ball is shot from the top of a building with an initial velocity of 15 m/s at an angle 0= 45 above the horizontal. Part A: What are the x and y components of the initial velocity?

Express your answer using two significant figures.

Part B: If a nearby building is the same height and 55 m away, how far below the top of the building will the ball strike the nearby building?

Express your answer using two significant figures.

Red light strikes a metal surface and electrons are ejected. if violet light is now used with a 10% greater intensity, what will happen to the ejection rate (number of ejected electrons per second) and the maximum energy of the electrons? a) greater ejection rate; same maximum energyb) same ejection rate; greater maximum energyc) greater ejection rate; greater maximum energyd) same ejection rate; same maximum energye) none of the above answers are correct

You can decrease the resistance of a length of wire by

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