Why does atomic radius decrease from left to right?

Why is the gravitational potential energy of an object 1 meter above earths surface more than its potential energy 1 meter above the moons surface?

Halley's comet orbits the sun roughly once every 76 years. It comes very close to the surface of the Sun on its closest approach. Estimate the greatest distance of the comet from the sun.

Four distinguishable particles move freely in a room divided into octants (there are no actual partitions). Let the basic states be given by specifying the octant in which each particle is located. How many basic states are there?

To set a speed record in a measured (straight-line) distance d, a race car must be driven first in one direction (in time 11) and then in the opposite direction (in tim e t). (a) To eliminate the effects of the wind and obtain the car's speed v.

Two wires carrying equal currents exert a force? on each other. (a) The current in each wire is doubled, while the distance of separation remaining constant.

According to the first law of thermodynamics, what could happen when heat is added to a system? The internal energy of the system decreases. The heat is turned into work done by the system. New energy is created within the system.

How does a parallel circuit differ from a series circuit? A. A parallel circuit has one path for electrons, but a series circuit has more than one path. B. A series circuit has one path for electrons, but a parallel circuit has more than one path. C.

When a potassium ion (k+) enters a gaurd cell it creates a solution of what?

If two plates diverge at a rate of 1.3 cm/year, how much farther apart will the plates be after 200 million years?

What is root-mean-square current?