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A transformer has 3,840 turns in the secondary. The inputvoltage is 110V, the output current is 6.5A. the input current is0.5A. Calculate the output voltage and the number of the number ofturns of the primary.
An object with a net charge of 44 µC is placed in a uniform electric ?eld of 554 N/C, directed vertically. The acceleration of gravity is 9.81 m/s^2. What is the mass of this object if it ?oats in this electric ?eld?
A hydraulic jack is made with a small piston 1.4 cm in diameter that is used to move a large piston 5.8 cm in diameter. how heavy a load can he lift with the jack
A star with the same mass and diameter as the sun rotates about a central axis with aperiod of about 28.4 days. What would be the new rotation period (s) of the star
Having taken a nap under a tree only 20 m from the finish line, Rabbit wakes up to find Turtle 19.5 m beyond him, grinding along at 1/4 m/s. If the bewildered hare can accelerate at 8 m/s2 up to his top speed of 17 m/s (38 mi/h) and sustain that s..
q1. a 500 g rubber ball is dropped from a height of 10 m and undergoes a completely elastic collision with the earth.a
An object suspended from a spring vibrates with simple harmonic motion. At an instant when the displacement of the object is equal to one-half the amplitude, what fraction of the total energy of the system is kinetic
A 67 kg person sits on a 3.5kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.8 cm in diam. Determine the pressure exerted on the floor by each leg of the chair; Assume the weight is evenly distributed.
A spherical raindrop of mass 0.00942 g and radius 1.31 mm falls from a cloud that is at a height of 1115 m above the ground. What would be the raindrop's speed just before landing on the ground if there were no drag force
A shopper in a supermarket pushes a cart with a force of 37.5 N directed at an angle of 17.0° downward from the horizontal. Find the work done by the shopper on the cart as he moves down an aisle 45.0 m long
An electron moves through an electric field, and its speed drops from 2200m/s to 1000m/s, what's the potential difference between the points at which the speed was measured
A factory worker pushes a crate of mass 32.0kg a distance of 4.85 along a level floor at constant velocity by pushing horizontally on it. How much work is done on the crate by friction
Two long, parallel wires are separated by a distance of 2.8 cm. The force per unit length that each wire exerts on the other is 5 ×10-5 N/m. What is the current in the second wire
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