In an experiment designed to measure the earth's magnetic field using the hall effect, a copper bar 0.490 cm thick is positioned along an east–west direction. assume n = 8.46 × 1028 electrons/m3 and the plane of the bar is rotated to be perpendicular to the direction of
brightarrowhead. gif. if a current of 8.00 a in the conductor results in a hall voltage of 5.55 multiply. gif 10-12 v, what is the magnitude of the earth's magnetic field at this location?
in µt

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

Ateam of astronauts is on a mission to land on and explore a large asteroid. in addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. with what minimum initial speed vesc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? assume that the asteroid is approximately spherical, with an average density p 3.84 x108 g/m3 and volume v 2.17 x 1012 m3 recall that the universal gravitational constant is g 6.67 x 10-11 n m2/kg2

What happens when the vapor pressure of a liquid is equal to the external pressure?