What type of waves do not require a physical medium?

a. Water waves

b. Sound waves

c. Electromagnetic waves

d. All waves require a physical medium.

The thrust from a car is 2000 N. The air resistance and friction together total 680 N. What happens to the speed of the car?

Methane can have many isomers.

A net force acts on a mass of 8.00 kg causing it to move from rest to a speed of 10.0 m/s in a time of 5.00 s. The bet force must have a magnitude of A. 8.00n B. 16.0n C. 40.0n D. 80.0n

A spaceship of mass 2.0*106 kg is cruising at a speed of 5.0*106 m/s when the antimatter reactor fails, blowing the ship into three pieces. One section, having a mass of 5.0*105 kg, is blown straight backward with a speed of 2.0*106 m/s.

600-nm light is incident on a diffraction grating with a ruling separation of 1.7 10 m. The second order line occurs at a diffraction angle of: 42 45° 21° 10°

A 98.1 kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.69 rad/s. A monkey drops a 9.29 kg bunch of bananas vertically onto the platform.

7. A type of non-renewable energy would be: O wind O petroleum O water solar

A refrigerator is a system. The energy input into the refrigerator system (in the form of electricity) is the same as the amount of energy output from the system. Which of the following best describes the energy output of the system?

A 1,120 kg car is travelling with a speed of 40 m/s. Find its energy.

3. Calculate the amount of current through a 45-watt light bulb that is connected to a 120-volt circuit in your home.