Which is the phase change in which a substance changes from a gas to liquid? condensation

vaporization

boiling

evaporation

A straight bar magnet is initially 4 cm long, with the north pole on the right and the south pole on the left. if you cut the magnet in half, the right half will

Give function of iris

Your car has stalled and you need to push it. You notice as the car gets going that you need less and less force to keep it going. Suppose that for the first 15 m your force decreased at a constant rate from 210 N to 45 N.

An object travels in a circular path of radius 5.0 meters at a uniform speed of 10. meters per second. What is the magnitude of the object's centripetal acceleration? How do you know?

The total kinetic energy something contains is called its a) heat, heat content, or thermal energy. b) temperature. c) mean energy. d) none of the above

If two parallel light rays hit a plane mirror, what will be their orientation to one another after they reflect? a. they will remain parallel. b. they will be perpendicular. c. it depends on the initial spacing between the light rays. d.

To extend the electrical system between the main panel and the secondary panel, the electricians used A. Receptacles B. Circuit breakers. C. feeders. D. insulators

Men in the age of 18-34 years need to be able to run a marathon in 3 hours and 10 minutes to qualify for the Boston Marathon. How many seconds is this? Show your work.

What is the center of our solar system?

A - 4.0-µC charge is located 0.45 m to the left of a + 6.0-µC charge. What is the magnitude and direction (to the right or to the left) of the electrostatic force on the positive charge?