An atom of calcium-48 and an atom of calcium-47 differ in A) atomic number. B) nuclear charge. C) number of neutrons. D) number of electron

This reaction appears to be destroying the logs. when it is over only ash will remain, the law of conservation of mass tells us no mass is lost. how can you explain this?

Which meteorites are the most useful for defining the age of the solar system? Why?

A barometer is used to measure air pressure.

What is the average of the speed of light

Which of the following is not a possible environmental consequence of urban sprawl? A) deforestation B) pollution C) loss of natural resources D) decrease in water quality E) none of the above

Order the steps to describe how information is sent. A signal is produced. A signal is seen, heard, or used. Radio waves are modulated and amplified. Radio waves are amplified and demodulated.

The national grid supplied a house with 18000000 J of energy in 1 hour. What was the average current supplied to the house in that hour? Write any equations that you use.

Claudia throws a baseball to her dog. Which free-body diagram shows the baseball when it's flying horizontally in midair? (Assume no air resistance.)

Which of the following substances will show the smallest change in temperature when equal amounts of energy are absorbed? water air sand concrete

The downward acceleration of a falling body on Earth is 9.81m/s2. On the moon the same quantity is 1.62m/s2. An astronaut in a space suit has a mass of 145kg.