In what scenario might a red ball appear black?

The momentum of car is 3000kgm/s. The mass of the car is 1200 kg. What is the velocity of the car

Has scientific knowledge changed over time?

Two technicians are discussing reasons why the brake fluid level in the master cylinder might drop. Technician A says that it is normal for the fluid level to drop as the brake linings wear.

a _ is an explanation that unifies the findings of many experiments, and it can be changed when new experimental results need to be explained

Which of the following is a negative consequence of commercial fishing

Based on how the book describes a heat pump in sec 16.3 how does a heat pump prove law of conservation of energy

When a gas in a container is squeezed to half its volume, its density?

A ballet student with her arms and a leg extended spins with an initial rotational speed of 0.90rev/s. As she draws her arms and leg in toward her body, her rotational inertia becomes 0.80 kg⋅m2 and her rotational velocity is 4.1rev/s.

The power rating of a vacuum cleaner is 0.8 kilowatts. If you use the vacuum cleaner for 2.5 hours, how much energy does it use?

Which has more gravitational potential energy - - a cliff diver at the top of the cliff or a cliff diver at the bottom of the cliff?