Which would you expect to have the greatest amount of friction?

a - a smooth surface on a smooth surface

b-a smooth surface on a rough surface

c-a rough surface and air

d-a rough surface on a rough surface

Hardness may be defined as the resistance of a material to scratching. a. True b. False

The height of a horse is sometimes given in units of "hands." Why was this a poor standard of length before it was redefined to refer to exactly 4in.?

H20 consists of polar molecules. CO2 consist of no polar molecules. How do chemist explain this difference?

How much voltage is required to run 0.025 A of current through a 36 Ω resistor? A. 6.9 x 10^-4 V B. 1.4 x 10^3 V C. 1.1 V D. 0.90 V (the answer is D. 0.90 V)

How would the velocity of the book change if the applied force were equal to the sliding friction force

Which equation expresses the conservation of mechanical energy in a system that involves kinetic energy, gravitational potential energy, and elastic potential energy?

Which of these is an example of temperature changing over time? A. a pan cools off on the stove B. a frozen dinner sits in the freezer C. a mug is at room temperature on the counter D. two glasses of water are filled from the tap and mixed together

A syrup added to an empty container with a mass of 115.25g. When 0.100 pint of syrup is added, the total mass of the container and syrup is 182.48g. Determine the density ... ?

MOST high schools teach biology, then chemistry, then physics. What do you see as some of the disadvantages of the traditional sequence to both students and teachers.

If you break a bar magnet in half, each half