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The secondary voltage of an ignition transformer in a furnace is 14.5 kV. When the primary operates at an rms voltage of 100 V, the primary impedance is 23.3 O and the transformer is 91.9% efficient.
a) What turns ratio is required?b) What is the current in the secondary?c) What is the impedance in the secondary?
a 7.0-m-diameter garden pond holds 6.4 times 103 kg of water. solar energy is incident on the pond at an average rate
Consider the transitions 3d -->2p in hydrogen. Calculate the possible energies of emitted photons, taking into account the spin-orbital interaction. How many photon lines are there? Please show formulas and explain clearly
A common flashlight bulb is rated at 0.300 A and 2.60 V, what is the temperature of the filament when the bulb is on? Calculate in deg Celsius
An ?-particle has a charge of +2e and a mass of 6.64 10-27 kg. It is accelerated from rest through a potential difference that has a value of 1.38 106 V, What is the speed of the ?-particle
A cue stick hits a cue ball with an average force of 23.8 N for a duration of 0.0246 s. how fast is it moving after being struck
A child throws a softball straight up with an inital speed10m/s. Find the maximum height above the child's hand that the ball reaches.
A puck with mass m = 0.18 kg slides along a frictionless horizontal surface at v = 6.3 m/s . It hits and sticks to the free end of a spring with k = 18 N/m, Find the period of the subsequent simple harmonic motion
A cord of length 1.5 m is fixed at both ends. Its mass per unit length is 1.1 g/m and the tension is 11 N. What is the frequency of the fundamental oscillation
Construction cranes are able to balance heavy loads by using a counterweight. The crane operator can slide the entire torque arm horizontally in order to balance the load.
Magnetic resonance imaging needs a magnetic field strength of 1.5 T. The solenoid is 1.8 m long and 75 cm in diameter. It is tightly wound with a single layer of 1.70-mm-diameter superconducting wire.
Suppose you aim to suspend in air a perfectly reflecting 4cmx4cm surface, with mass m = 0.00045kg. What intensity of light must you shine on it
Planet X is 307 times more massive than Earth, and its radius is 10.8 times Earth's radius. How many times more would you weigh on Planet X
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