Which of the following statements is true of a gas?

It has a fixed volume, but not a fixed shape

It has closely packed molecules

It can change into a liquid by adding heat

It takes the shape and size of a container

You need to move a 122-kg sofa to a different location in the room. It takes a force of 81 N to start it moving. What is the coefficient of static friction between the sofa and the carpet?

If the force experienced by a positively charged balloon is 2.7 newtons and the electric field strength is 7.8 * 105 newtons/coulomb, what is the magnitude of the charge on the balloon?

Write newtone first law

What is the equivalent resistance for a series circuit with three resistors: 19.2 ohms, 24.6 ohms, and 31.2 ohms?

Cars A and B have the same mass, but Car A's speed is 15 mph, whereas Car B is moving at 60 mph. The kinetic energy of Car B is: times that of Car A times that of Car A 2 times that of Car A 4 times that of Car A 16 times that of Car A

When the volume increased, what happened to the density?

8. Chemical weathering occurs more rapidly in what kind of climates? A. Desertlike B. Cold with high snowfall amounts C. Cool and dry D. Warm with abundant rainfall

Recoil is noticeable if we throw a heavy ball while standing on a skateboard. If instead we go through the throwing motion but hold onto the ball, without friction effects our net recoil will be A) zero. B) the same as before.

If an electromagnet is used to pick up nails and other metal objects, what happens when the current is turned off?

An electron enters a region of uniform perpendicular en and bn fields. it is observed that thevelocity nv of the electron is unaffected. a possible explanation is: