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A transformer has 450 turns in its primary coil and 30 turns in its secondary coil. Which one of the following statements concerning this transformer is true?
1) This is a step-up transformer.
2) The turn’s ratio is 15 for this transformer.
3) The ratio of the voltages Vs / Vp is 15 for this transformer.
4) The ratio of the currents Is / Ip is 0.067 for this transformer.
5) The power delivered to the secondary must be the same as that delivered to the primary.
A racket ball is struck in such a way that it leaves the racket with a speed of 4.87m/s in the horizontal direction. Find the height of the racket ball when it left the racket
Estimate the mass of water vapour emitted from the cooling towerseach hour, the mass of water vapour produced in a week, and thevolume of condensed water vapour produced in a week.
an object at point 0 is travelling along at a leisurely 30m/s. all of a sudden it accelerates at 2m/s^2 for 2 minutes. how far did it travel from its starting point
A fisherman notices that his boat is moving up and down periodically, owing to waves on the surface of the water. What is the amplitude of each wave
a golf ball strikes a hard smooth floor at an angle of 22.1 deg and as the drawing shows rebounds at the same angle.
Three identical blocks are stacked with each extending as far aspossible over the block beneath it. Find the distance Dthat the top block overhangs the bottom block if the length of eachblock is 34.6 cm.
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A wheel is disconnected from a motor and come to rest from 15,000 rpm because of a 1.00 m·N frictional torque. How many revolutions has the wheel turned before coming to rest
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0437 s, determine the vertical components of the launch velocity
An ice-making machine operates in a Carnot cycle. It takes heat from water at 0.0°C and rejects heat to a room at 22.5°C, How much heat is discharged into the room
in order to move a 500 kg pallet load of bricks down a smooth concrete driveway you tie a rope between the pallet and
A ball is thrown directly downward, with an initial speed of 6.25 m/s, from a height of 34.4 m. After what interval does the ball strike the ground
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