Which best describes what a refrigeration system would do? It adds cold air through the room. It moves the thermal energy to another place. It allows coolant to release cold air into the room. It transfers energy from the ground.

A 3-kg mass is in free fall. What is the velocity of the mass after 7 seconds?

Which statement about coal is true? When burned, coal produces pollutants that are released into the air. Coal will always stay plentiful in the United States. Mining coal improves the environment. Burning coal does not pollute the air.

Use the equation Q = (m) (c) (Δ T) to calculate the heat gained by the cold water for each trial. Show your work using the problem-solving method shown in previous rubrics. The specific heat for water (c) is 4186 J / (kg * C°).

How much work is required to move 3.0 coulombs of electric charge a distance of 0.010 meter through a potential difference of 9.0 volts? (1) 2.7 * 10^3 J (3) 3.0 J (2) 27 J (4) 3.0 * 10^-2 J

In a process called pair production, an energetic gamma ray is converted into an electron and a positron.

The buildup of charges on an object is called

Which of the following statements is true? The freezing and boiling temperatures of a substance are the same. The freezing and condensation temperatures of a substance are the same. The freezing and melting temperatures of a substance are the same.

What's bigger 32A or 32B

Two charged objects have a repulsive force of. 080 N. if the charge of both of the objects is doubled, then what is the new force?

A hiker leaves her camp and walks 3.5 km in a direction of 55° south of west to the lake. after a short rest at the lake, she hikes 2.7 km in a direction of 16° east of south to the scenic overlook.