Why does of beam of light ben when it passes into a new medium?

When an object is heated it contracts. a. true b. false

The table below shows the acceleration of gravity on different bodies in the solar system. on which body would a 10 kg lamp has the most gravitational potential energy when lifted to a height of 2 m? a. earth b. mars c. neptune d. uranus

Which of the following is an example of motion in two dimensions?