Suppose the glass paperweight has index of refraction n=1.38. a) find the value of θ for which the reflection on the vertical surface of the paperweight exactly satisfies the condition for total internal reflection. b) if θ is increased, is the reflection at the vertical surface still total?

True or false: the cycle of seasons on the earth is caused by the tilt of the earth on its axis toward and away from the sun.

Acar going 10 m/s starts accelerating at a rate of 3 m/s2 for 4 seconds calculate the final velocity of the car

Which statement is an example of the law of conservation of energy? a soccer ball eventually stops because its energy disappears. when a light bulb is turned on, electrical energy is converted to light and heat. an automobile engine burns gasoline to converts its chemical energy to electrical energy.