A worker is holding a filled gas cylinder Weil which two sentences are true about the energy of the filled gas cylinder 1. It has no energy because it’s being held still.
2. It has gravitational potential energy because of its height.
3. It’s atoms and molecules have thermal energy.
4. It has motion cause it will fall if let go.
5. It’s kinetic energy is being converted to potential energy.

Which is not a source of noise pollution? a)airplanes b)acid rain c)machines d)cars

Which of the following is not am example of a polymer? protein nylon kevlar concreta

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?