The first law of thermodynamics states that E=Q-W. How is this also a statement of the principle of conservation of energy?

A person pushes a refrigerator across a horizontal floor. The mass of the refrigerator is 110 kg, the coefficient of static friction between the refrigerator and the floor is 0.

A screen is placed between two lamps so that they illuminate the screen equally. The first lamp emits a luminous flux of 1375 lm and is 5 m from the screen.

What is the main way that scientists determine which conditions can support life

Atoms are electrically neutral because there are an equal number of protons in the nucleus and In the cloud around the nucleus

A 4.10 g bullet moving at 837 m/s strikes a 820 g wooden block at rest on a frictionless surface. The bullet emerges, traveling in the same direction with its speed reduced to 467 m/s.

Which of the following statements about electrons is not true? A) Electrons orbit the nucleus rather like planets orbiting the Sun. B) Within an atom, an electron can have only particular energies.

In longitude waves, the medium moves parallel to the direction of energy transport

Thomsonâs experiment is credited with the discovery of which particle?

When you drop a pebble from height h, it reaches the ground with kinetic energy k if there is no air resistance. from what height should you drop it so it will reach the ground with twice as much kinetic energy?

Explain two ways that technology has had a positive impact on the environment and two ways that it has had a negative impact on the environment.