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1. A superconducting film can be used as a high sensitivity bolometer (an instrument for measurement of heat radiation). Explain.
2. To what extent can the two electrons in a Cooper pair be thought of as moving as if they were bound to opposite ends of a spring? What property of the system constitutes the spring?
3. Exactly what is the distinction between the energy states of an electron in a superconductor and the energy states of the superconductor itself?
The space shuttle typically orbits 400 kilometers above the earth's surface. The earth has a mass of 5.98 × 1024 kilogram and a radius of 6,380 kilometer. Find the acceleration due to gravity at that altitude
A proton (+1.6 · 10 -19 C) moves 10 cm on a path in the direction of a uniform electric field of strength 3.0 N/C. How much work is done on the proton by the electrical field
A gas is compressed at a constant pressure of 0.800 atm from 12.00 L to 2.00 L. In the process, 410 J of energy leaves the gas by heat. what is the change in its internal energy
Consider a simple pendulum of length l and mass m placed in a rail-road cart that has constant acceleration a in the positive x-direction.
A pet-store supply truck moves at 25m/s north along a highway. Inside, a dog moves at 1.85m/s at an angle of 35° east of north. What is the velocity of the dog relative to road.
A bicyclist of mass 81 kg puts all his mass on each downward-moving pedal as he pedals up a steep road. Take thediameter of the circle in which the pedals rotate to be 0.41 m, anddetermine the magnitude of the maximum torque he exerts.
a plane is flying at 120 ms and drops cargo to people 500 meters below. 1where do the people need to stand in relation
A 5.63 kg crate slides on a horizontal surface. The coefficient of kinetic friction between the surface and the crate is 0.383. estimate the magnitude of the external force acting on the crate
How can we determine during a lunar eclipse whether the earth moves faster or the moon using minimum instruments?
You toss a racquetball directly upward and then catch it at the same height you released it 2.24 s later. Suppose air resistance is negligible. What is the initial velocity of the ball? What is the maximum height of the ball?
A flexible circular loop of 10 turns lies in the plane of the paper. The radius of the loop is 0.150 m. The magnetic field is 0.250 T directed into the paper. The area of the loop is reduced to zero in 0.125 s. Determine the magnitude of the avera..
A group of identical capacitors is connected first in series and then in parallel. How many capacitors are in the group
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