If an atom is neutral how many electrons are there compared to the number of protons?

Estimate the length of the neptunian year using the fact that the earth is 1.50Ã108km from the sun on average.

Wave A is being decreased in temperature, and Wave B is moving from a liquid to a gas medium. Which statement can be made about both waves? A. They will speed up. B. They will increase the density of their medium. C. They will slow down. D.

How does the use of hydroelectric energy compare to the use of coal? a. Hydroelectric energy is more commonly used than coal. b. Hydroelectric energy is associated with less waste production than coal. c.

What are three area of science that rely on physical science

Suppose a rubber ball and a steel ball collide. which, if either, receives the larger impulse? explain.

Which of the following statements concerning Howard Gardner's multiple intelligences is not correct? A. Gardner is not interested in assessing levels of intelligence. B. Gardner has based his theory on research in various areas of psychology. C.

The force of attraction between two oppositely charged pith balls is 5.3 * 10-6 newtons. If the charge on the two objects is 6.7 * 10-9 coulombs, what is the distance between the two charges? (k = 9.0 * 109 newton·meter2/coulombs2)

To describe velocity you need to know?

Mohammed made a chart to list examples and nonexamples of projectile motion. Which best completes the chart? a - a football thrown in the airb - a kite flying on a stringc - a golf ball rolling off a table d - water spraying from a fountain

Halley's Comet appears around the sun about once every 76 years. It passes through the part of its orbit nearest the sun in just a few months but then moves out to great distances and takes more than half a century for the rest of its orbit.