A metal bar of length L=0.50m, and mass M=0.36kg, and resistance R=6.000ohms is placed on frictionless rails that are at an angle theta=23o above the horizontal. The resistance of the rails is negligible. The bar is released from rest in a uniform magnetic field B=1.50T that is directed vertically downward. Suppose that the that there is a frictional force between the bar and the rails. If the coefficient of kinetic friction between the bar and the rails is mu=0.20, what is the terminal speed of the bar?

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.

Considering only the earth's rotation, determine how much later the asteroid would have had to arrive to put the explosion above helsinki at longitude 25˚ e? this would have obliterated the city.

What is the mass of the water that is being heated? it requires 2,500 joules to raise a certain amount of water (c = 4.186 jig c) from 20.0°c to 60.0°c. o 159 o 40 g o 63 g o 80 g