Three hundred joules of heat are added to a system. The system uses 140 joules to do work.

By how much did the internal energy of the system change?

a 140 J

b 160 J

c 240 J

d 440 J

Is Fahrenheit an SI unit?

When a 83.0 kg. person climbs into an 1600 kg. car, the car's springs compress vertically 1.6 cm. What will be the frequency of vibration when the car hits a bump? (Ignore damping.)

Three resistances 2 ohm, 3ohm and 5 ohm are connected in parallel and a potential difference of 20V is applied across the terminals of combination. The potential difference across 3 ohm resistance is:

A small sphere with a mass of 441 g is moving upward along the vertical + y-axis when it encounters an electric field of 5.00 N/C. If, due to this field, the sphere suddenly acquires a horizontal acceleration of 13.

Which factor does not affect stream size and speed?

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.

Are oranges called oranges because oranges are orange, or is orange called orange because oranges are orange?

An object at rest has no net force acting on it. a. True b. False