If the area of an iron rod is 10 cm by 0.5 cm and length is 35 cm. find the value of resistance, if 11x10^-8 ohm. m be the resistivity of iron.

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)