The magnitude of the magnetic field in a magnetic resonance imaging (mri) machine can be as great as b = 2.0 t . under normal circumstances, this field cannot be shut off by just flipping a switch. instead the magnitude needs to be carefully decreased to zero. in an emergency, however, the magnet can be "quenched" so that b reduces to zero in 20 s. such a quench can cost thousands of dollars and likely damages the magnets. assume that the magnetic field exists inside a cylinder of radius r = 300 mm and length ℓ = 200 mm . part a how much magnetic potential energy is dissipated when the magnetic field is quenched in this way?

Aregion of space in which a measurable gravitational force is indicated by the force exerted on a test mass is called

1. how much energy is needed to raise the temperature of 40.0 g of argon from 25c to 40c? the specific heat capacity of argon is 0.520 j/(g·k) 2a. 23.0 ml of 0.100 m hcl (standard) are added from a buret to neutralize 50.0 ml of an unknown basic solution. 2b. if the oh- produced in the previous reaction came from ca(oh)2, then what is the molarity of the ca(oh)2? 3.calculate the new freezing-point of a solution when 60.5 grams of cacl2 solute is dissolved in 0.612 kg of water. 4. what is the maximum number of moles of alcl3 that can be produced from 5.0 mol al and 6.0 mol cl2? 5. a sample of oxygen gas has a volume of 150 ml when its pressure is 0.923 atm. if the pressure is increased to 0.987 atm and the temperature remains constant, what will the new volume be? 6. nitrogen gas in a closed container at a temperature of 100.0 oc and 3.0 atm is heated to 300 oc. what is the pressure of the gas at the higher temperature?

Which type of basaltic lava flow has a fairly smooth