Which of these is a pure substance?

A. cake mix

B. ocean water

C. 10 carat gold

D. solid gold

What causes the weight of an object to change depending on if it is on Earth or the Moon?

The police department is very proud of their new police cars. They announced that they are able to go from a stopped position to 80 miles per hour in 6 seconds. They are describing their cars'

The conservation of energy principle applies to a. all systems. b. open systems. c. closed systems. d. Ideal gas systems.

Which term describes the rate at which electrical energy is used

Which of the following solutions can be used to neutralize a solution of HMO3

Match the following. 1. energy a push or a pull 2. mechanical energy energy of a moving object 3. kinetic energy a force directed away from an object 4. heat the ability to do work 5. work a force moving an object through a distance 6.

Scientists hypothesize that oxygen began to accumulate in earth's atmosphere of living things with the ability to?

The 3 stages of the water cycle are

What is the main natural force responsible for mass movement of rocks and debris?

In a mass spectrometer, a specific velocity can be selected from a distribution by injecting charged particles between a set of plates with a constant electric field between them and a magnetic field across them (perpendicular to the direction of