Sally was recording the time of day that the moon rose and set. Sally started her observations with the full moon. The full moon rose at sunset and set at sunrise. She noticed that when the 3rd quarter moon rose it was

If a student walks 3 blocks/min, how long will it take him to walk 10 blocks?

An ice cube has been given a push and slides without friction on a level table. Which is correct? (a) It is in an unstable equilibrium. (b) It is in neutral equilibrium. (c) It is not in equilibrium. (d) It is in stable equilibrium.

Georgiana has the idea that salt water heats up faster than fresh water. Which of the following would be acceptable scientific proof of her hypothesis?

What effect would adding additional neutrons have on the forces in a nucleus?

State a material that has poor thermal conductivity

A spaceship takes off vertically from rest with an acceleration of 30.0 m/s 2. What magnitude of force F is exerted on a 53.0 kg astronaut during takeoff?

A hydrogen atom has one proton, two neutrons, and no electrons. Is this atom neutrally charged? Explain your answer.

A small rock with mass 0.12 kg is fastened to a massless string with length 0.80 m to form a pendulum. The pendulum is swinging so as to make a maximum angle of 45 ∘ with the vertical. Air resistance is negligible. A.

What does the model below represent? 200 + 02 → 2002

Efficiency of a standard 60 W lightbulb