A metal radiator's temperature falls from 90 degrees Celsius to 40 degrees Celsius. What has happened to the thermal energy contained by the radiator?

A.

It has increased.

B.

It has remained constant.

C.

It has decreased.

D.

It has been destroyed.

A capacitor stores an energy of 8 Joules when there is a voltage of 51 volts across its terminals. A second identical capacitor of the same value is stores an energy of 2 Joules. What is the voltage across the terminals of the second capacitor?

If you hold a 50 kilogram barbell above your head for 3 seconds and the acceleration due to gravity is 9.8 meters per second per second, how much work did you do? OA) OJ OB) 150 kg s OC) 490 N OD 1,470 NS

How long ago did the Big Bang happen?

The circumference of the Earth is approximately 40,000 km. The Earth has a magnetic field that protects it from solar particle radiation. The major element comprising the solid inner core of the Earth is iron. The Earth is approximately 4.

A package of aluminum foil contains 50. ft2 of foil, which weighs approximately 6.0 oz. Aluminum has a density of 2.70 g/cm3.

Newton's third law states that when an object exerts a force on another object, the second object exerts an equal but opposite force on the first object. Which of the following shows an example of this? a.

A car is moving 14.4 m/s when it hits the brakes. It slow from 78.8 m, which take 9.92s. It then accelerates at 1.83 m/s 2 for 4.50 s. What is the total displacement?

Select all of the answers that apply. What conditions on Earth are unique from other planets in our solar system?

Which is a chemical change

A 20-N falling object encounters 4 N of air resistance. The magnitude of the net force on the object is?