The only thing that distinguishes one light ray from another is its ...

The intensity of light from a star varies inversely as the square of the distance. If you lived on a planet ten times farther away from the sun than the Earth, how would the light intensity of the sun compare with that on Earth?

A 60 kg bungee jumper jumps from a bridge. She is tied to a bungee cord that is 15 m long when unstretched and falls a total distance of 31 m. Calculate (i) the spring constant of the bungee cord.

Climate change adds another level of uncertainty to the world. T/F

Examples for inertia

In a baseball game, a batter hits the 0.150-kg ball straight back at the pitcher at 180 km/h. If the ball is traveling at 160 km/h just before it reaches the bat, what is the magnitude of the average force exerted by the bat on it if the collision

Based on the periodic table above, which of the following elements is a metal?

Car crosses the first third of the road with unknown speed and the rest of the road with the speed of 50 km/h. What is the the speed in the first third if the average speed of a car is 30km/h?

1. A car speeds up from 10.0 m/s to 45.0 m/s in 4.0 s. What is its acceleration? In your response, show your work, the given and unknown quantities, the equation, and any necessary algebra.

The greater the force exerted by the engine of a car over a set distance, the greater the change in?

How do most complex organisms get their energy?