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The beam current in a color TV tube is 1.9 rnA. The beam cross section is circular with radius 0.5 mm.
(a) How many electrons strike the screen per second?
(b) What is the current density?
A small plane departs from point A heading for an airport 500 km due south at point B, Determine the proper heading for the plane and the time of flight
Keilah, in reference frame S, measures two events to be simultaneous. Event A occurs at the point (37.0 m, 0, 0) at the instant 9:00:00 Universal time on January 15, 2010. What time interval elapsed between the events
A platinum resistance thermometer has a resistance of 100ohm at 0 deg and the value of alpha is 0.00385. Calculate the temperature
A small airplane has a mass of 2500 kg and is flying at a speed of 100. m/s at a height of 340 m above the ground. Determine the kinematic energy of the airplane while it is flying
An electric vehicle starts from rest and accelerates at a rate of 1.7 m/s2 in a straight line until it reaches a speed of 27 m/s. How much time elapses from start to stop
The magnetic coils of a tokamak fusion reactor are in the shape of a toroid having an inner radius of 0.545m, Find the magnitude of the magnetic field inside the toroid at the following locations
A herd of wild horses races across the flat, open plains of the Great Basin in central Nevada. If the horses are running at 12.1 m/s at a compass heading of 286 degrees, illustrate what is the northward component of their velocity?
a moving rod is observed to have a lenght of 2m and to be oriented at an angle of 30 degrees with respect to the direction of motion. what is the orentation angle in the proper frame
What is the magnitude of the magnitic filed.
The observed frequency of a train whistle is 475Hz as it approaches a stationary observer and is 410Hz as it recedes
Then the driver sees a red light up ahead at next intersection, and starts slowing down at the constant rate. The car stops at the red light, 180 {rm m} from where it was at t = 0.
A pulse from a ruby laser (lambda = 694.3 nm) has an average power of 20 MW and lasts 2.3 ns. What is the total energy of the pulse
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