How far from bottom of dish must sensor be positioned
Dish antennas have the parabolic cross-section. This concentrates signals onto the sensor at focus of parabola. The dish antenna is 1 m wide and 20 cm deep. How far from bottom of the dish must sensor be positioned?
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The armature of a small generator comprises of a flat, square coil having sides of length L and with N turns. The coil rotates in a magnetic field of magnitude B. Determine the angular speed of the coil when the maximum emf generated is?
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Certain neutron stars (very dense stars) are believed to be rotating at around 10 rev/s. When such a star has a radius of 18 km, determine what should be its minimum mass so that material on its surface remains in place throughout the rapid rotati
The plane of a rectangular loop of wire having a width of 5.0 cm and a height of 8.0cm is parallel to the magnetic field of magnitude 0.23T. The loop carries a current of 6.9A. i) Determine what torque acts on the loop?
Determine the maximum compression of the spring? Determine the final velocities of the blocks after the collision? Is the collision elastic? Avoid the mass of the spring.
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Suppose an asteroid's moon is 1.3 km wide, and that its center is 100 km from the center of the asteroid, that is 55 km long. The moon's orbit is circular having a period of 20 h. The volume of asteroid is around 14,100 km3. Determine the density
If elliptical pattern of the whispering gallery is 92 feet long by 58 feet wide, how far from whisperer at 1 focus is listener at other focus?
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