Two carts with magnets attached, make up a system. The mass of one cart and the magnet is 1kg and the mass of the other cart and magnet is 5 kg. They are initially at rest on a frictionless track and then are released causing the two magnets to repel one another. Each is given an initial speed of 0.5 m/s. Once the carts are separated, the space between them is large enough to make the magnetic forces negligible. The track is slanted such that one side is slightly lower than the other.

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

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?

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.