Your physics class is conducting an experiment on the energy exchange between colliding objects. You and your classmates have identical materials and are experimenting with identical
conditions. You perform three trials, and your data is different in each trial. You compare results
with your peers and find that everyone has different data.
How is the scientific experiment limited?

The most important difference between a wedge and an inclined plane is a. their size b. their shape c. how they are used d. what they are made of

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

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?