The intensity I of light from a light bulb, measured in watts per square meter (w/m squared), varies inversely as the square of the distance d from the light bulb. Suppose I is 70 w/m squared when the distance is 3 m. Find the intensity when the distance from the light bulb is 2 m away.?

When a resistor with resistance r is connected to a 1.50-v flashlight battery, the resistor consumes 0.0625 w of electrical power. (throughout, assume that each battery has negligible internal resistance.) what power does the resistor consume if it is connected to a 12.6-v car battery? assume that r remains constant when the power consumption changes.

Which composition of water moves to begin a deepwater current?

Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.