When two or more pure substances are blended together the result is a?

Which answer best describes the scientific method? O A. An experiment that has no dependent variables B. Five processes that scientists use to answer questions C. A variable that depends on another variable O D.

A ball is thrown straight up into the air. At each of the following instants, is the ball's acceleration ay equal to g, - g, 0, g?

Data from a survey: A. will be only numbers based because surveys have to be multiple choice. B. can be qualitative or quantitative depending on the questions asked. C. can include only descriptions of things because survey questions are open ended.

Lightning is created when charges flow rapidly from a. ground to cloud. b. cloud to ground. c. cloud to cloud. d. all of these.'

Monochromatic light strikes a metal surface and electrons are ejected from the metal. if the intensity of the light is increased, what will happen to the ejection rate and maximum energy of the electrons?

Which of the following is the most accurate description of the relationship between velocity and acceleration? A. Velocity and acceleration are the same thing. B. Velocity is a type of acceleration. C. Acceleration is a change in velocity. D.

The force needed to move an object 14 meters with 83 joules of work is what?

What is the relationship between fossil fuels and energy? A. Fossil fuels are a form of mechanical energy. B. Fossil fuels are a form of chemical energy. C. Fossil fuels are a form of geothermal energy. D. Fossil fuels are a form of nuclear energy.

A horizontal piston-cylinder compresses adiabatically 1 mol of propane gas, initially at 350 K, from 0.04 to 0.01 m3.

One problem for humans living in outer space is that they are apparently weightless. One way around this problem is to design a space station that spins about its center at a constant rate.