What is the total kinetic energy and potential energy of a object or group of objects

How many valence electrons would an element with atomic number 84 have

The volume of a gas is reduced when the temperature is decreased

Describe the arguments supporting the idea that quasars are at the distances indicated by their redshifts.

As an airplane is flying 20.0 degrees north of east at a speed of 750 km/h. How fast is it moving to the north

Can you list and summarize Kepler's 3 laws that govern the motion of planets?

What should a scientist do to use scientific methods for determining the relative age of Earth's rocks? A be biased in opinion B disregard views of others C use creative ideas D prove that methods are non-testable

If a sample of gas is heated at a constant pressure what will happen to the volume of the gas

1. What is the speed of sound in air that has a temperature of 90.0 °C?

What effect does a doubling of the mass have upon the acceleration of the object? Be quantitative.

What type of intermolecular forces would you expect to find in a pure liquid sample of carbon tetrachloride?