what properties of substance would you need to know in order to determine if it is a pure substance or mixture?

When is a circuit considered an open circuit?

The reacting force that is equal to and opposite in the direction to the centripetal force and tends to fling air out of the center of rotation of High and Low pressure systems is?

Are you ready for a brain twister? Murphy can row at 5 kmph in still water. If the velocity of current is 1 kmph and it takes him 1 hour to row to a place and come back, how far is the place?

Which is true? An ideal emf device has internal resistance and a real emf device does not. A real emf device sets up a potential difference and an ideal emf device does not.

Which of the following is true of a mechanical wave

If 128 g of material is in the shape of a brick 2 cm wide, 4 cm high, and 8 cm long, what is the density of the material?

A source emits monochromatic light of wavelength 495 nm in air. when the light passes through a liquid, its wavelength reduces to 434 nm what is the liquid's index of refraction? a. 1.14 b. 1.49 c. 2.03 d. 1.26 e. 1.33

A ping pong ball with a dent in it can be put into a pan of boiling water. After a short amount of time, the dent will pop out. Determine the best reason for this occurrence. A) The ping pong ball plastic heats up and expands.

What is the difference between heat temperature and thermal energy?

Which statement about subatomic particles is true? A. Protons, neutrons aND electrons all have about the same mass B. Unlike protons or neutrons, electrons have no mass C. Neutrons have no charge and no mass D.