What force must be applied to move a 251 kg rock on a pavement like surface

What forces must be balanced in the Bohr model? A. electron attraction between electron and nucleus = centripetal force of the orbiting electron B.

Ships A and B leave the same port. Ship A sails at 20 knots (nautical miles per hour) and ship B sails south at 15 knots. At what rate is the distance between them changing at 2 pm if: a. A and B both leave at noon. b.

What does the sun provide in the water cycle?

Use the drop-down menus to answer each question. How do objects with the same charge interact? How do objects with opposite charges interact? How do uncharged objects interact?

A charged particle moves through a magnetic field. In which situation is the magnetic force zero? a. When the particle moves in the direction of the magnetic field vector. b. When the particle moves perpendicular to a magnetic field line. c.

One of the reasons it is important to keep our water supplies pollution free is potability. Water that is potable is A) polluted. B) oxygenated. C) fit to drink. D) unfit to drink.

3 forces that you exert when riding a bike

Kuiper Belt objects are composed of which substances? Select all that apply. A. Iron B. Silicon C. Water D. Methane E. Ammonia

If two protons are added to an oxygen nucleus, the result is

Which is larger than a single atom? a. magnetic domain b. electron c. neutron cloud d. proton