What is the relation between energy and amplitude of a light wave, if amplitudes a factor in energy?

A ball of mass 1.5kg is struck by a bat in the opposite direction to the motion of the ball. Before the impulse the ball is travelling at 16ms^-1 and the impulse of the bat on the ball is 50 Ns.

What are the distinguishing characteristics of each terrestrial planet

a circuit is connected to 8 volt battery and it has 2 amperes of current flowing through the wires. What is the resistance of the circuit

1. When driving in rain the road becomes the most slippery: Just after the rain quits Right after it starts to rain After it has rained for 20 minutes When the wind is blowing at least 25 mph

You have a small tank of water. Suppose you make waves in the tank, and measure their speed in different depths of water. Which is the independent variable, and which is the dependent variable?

At the beach, describe where or when you would see wave fronts. How are wave fronts useful to surfers?

How would the moon appear from earth if the moon did not rotate?

Block B has mass 4.00 kg and sits at rest on a horizontal, frictionless surface. Block A has mass 2.00 kg and sits at rest on top of block B. The coefficient of static friction between the two blocks is 0.400.

T=2π√ (l/g) is dimensionally correct

A penny falls from a windowsill which is 25.0 m above the sidewalk. How much time does a passerby on the sidewalk below have to move out of the way before the penny hits the ground?