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A transformer with an efficiency of 80% is connected to 50-volt alternating current source. The voltage and current in the secondary are 500 Volts and 0.1 Amperes respectively. What is the current in the primary?
A) 0.8 A
B) 1.0 A
C) 1.25 A
D) 1.35 A
E) 1.15 A
A hydraulic jack utilized to lift cars is called a three-ton jack. The large piston is 22 mm in diameter, the small one 6.3 mm. Suppose that a force of 3 tons is 3.0 x 104 N.
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 19.0 m/s at an angle 48.0 degrees; How high above the ground will the ball be when it gets to Julie
As a baseball is being caught, its speed goes from 30 to 0m/sin about .005s. Its mass is .145kg. What is the size of the force acting on it
Water is pumped into a storage tank from a well delivering 21.0 gallons of water in 27.0 seconds through a pipe of 1.00 in.2 cross-sectional area.
The wheel in the figure has eight equally spaced spokes and a radius of 34 cm. It is mounted on a fixed axle and is spinning at 2.1 rev/s. What minimum speed must the arrow have
A beam of light is incident from air on the surface of a liquid. If the angle of incidence is 28.5° and the angle of refraction is 16.6°, find the critical angle for the liquid
A mass-spring system oscillates with an amplitude of 5.60 cm. If the spring constant is 226 N/m and the mass is 453 g, determine the mechanical energy of the system
An object is placed 16.0 cm from a concave spherical mirror having a focal length of magnitude 50.5 cm. What is the magnification of the image
A convex spherical mirror with a radius of curvature of 11.0 cm produces a virtual image one third the size of the real object. Where is the object
A 330 ohm (330 ?) resistor is connected to an unknown voltage source. The Voltage- Current Sensor measures a current of 0.50 amps (0.50 A). What is the voltage of the voltage source
The distance between two telephone poles is d = 52.0 m. How much tension does the bird produce in the wire
A merry-go-round in the park can be considered a circular disk of mass 100 kilogram and a radius of 2.0 meter. Obtain the resulting angular velocity of the merry-go-round
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