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A fuse in an electric circuit is a wire that is designed to melt,and thereby open the circuit, if the current exceeds apredetermined value. Suppose that the material to be used in a fusemelts when the current density rises to 470 A/cm2. What diameter of cylindrical wire should be used to make a fuse that will limit the current to 0.49 A?
A solenoid is 1.6 m long and has 530 turns per meter. what is the cross sectional area of this solenoid if it stores .31 J of energy when it carries I=14A
Consider a system in equilibrium with a heat bath at temperature T and a particle reservoir at chemical potential ?. Determine the (grand) partition function of the system
Suppose Galileo's pulse rate was 68 beats per minute. What is the time between consecutive pulse beats
A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 66.3° above the horizontal. By how much does the rocket clear the top of the wall
A large fish hangs from a spring balance supported from the roof of an elevator. What will the balance read if the elevator cable breaks
A 6100 kg rocket is set for vertical firing from the Earth's surface. The exhaust speed is 1400 m/s. How much gas must be ejected each second if the thrust is to equal the weight of the rocket
A brick of mass M sits on a rubber pillow of mass m . Together they are sliding to the right at constant velocity on an ice-covered parking lot, Draw a free-body diagram of the brick and identify each force acting on it
In a nuclear power plant, the reactor produces 361? C steam that is used to power the steam turbines which generate 2202 MW of electrical power. The cooling tower eliminates the waste heat at 55?C. If the efficiency of the plant is that of a Carno..
A small motor is mounted on the axis of a space probe with its rotor (the rotating part of the motor) parallel to the axis of the probe. Through how many revolutions has the rotor turned
A 48.9 kg girl is standing on a 129 kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. What is the velocity of the plank relative to the ice surface
The filament of a light bulb has a temperature of 3.20E+3 °C and radiates 40 watts of power. The emissivity of the filament is 0.360. Find the surface area of the filament
A particle of charge +1.5 nC is placed at a corner of a Gaussian cube with sides 12.0 cm. What is the electric flux through the cube
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