If scientist sent light waves to four different objects in space, which would take the longest to bounce the wave back to earth

Suppose you are using total internal reflection to make an efficient corner reflector (see section 7). If there is air outside and the incident angle is 45.

How does the law of inertia relate to how the planets in our solar system revolve around the sun?

The material through which a wave travels is called?

A system does 203 J of work on its environment and gains 96.8 J of heat in the process. Find the change in the internal energy of (a) the system and (b) the environment.

You are pulling your little sister on her sled across an icy (frictionless) surface. When you exert a constant horizontal force of 120 N, the sled has an acceleration of 2.3 m/s2. Part A If the sled has a mass of 8.

A block sliding along a horizontal frictionless surface with speed v collides with a spring and compresses it by 2.0 cm. What will be the compression if the same block collides with the spring at a speed of 2v?

How does work get affected when a object is lifted up instead of using a ramp

Choose the correct statement. a. Usually, when one form of energy is converted to another, no energy is wasted. b. The total amount of energy in the universe is gradually decreasing. c. This statement illustrates the first law of thermodynamics. d.

A 10 cm3 block of paraffin (a type of wax) weighs 0. 085 N. It is carefully submerged in a container of gasoline. One cm3 of gasoline weighs 0.0069 N. a. What is the weight of the gasoline displaced by the paraffin? b.

What is a device made by joining two different materials to form a circuit that produces an electric current? a. convertor b. resistor c. semiconductor d. thermocouple