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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
Suppose a charge of -1.60 µC is at the origin and a charge of 3.30 µC is at the point (0, 3.00) m. Find the electric potential at (4.00, 0) m, assuming the electric potential is zero at infinity. V = 3 . V What is electric potential?
A layer of air has a temperature T0 of 30 Celsius at ground level and a lapse rate ? of 20 Celsius/km. determine its upward velocity at that point
a singly ionized nickel atom has an overall charge of 1e where e 1.602 x 10-19 c and a mass m 9.80 x 10-26 kg. it
A nail gun fires a nail into a piece of wood. The nail is going a velocity of 9.0 m/s right before entering the wood. From entering the wood, how long does it take the nail to come to a stop
A 3.0 resistor and a second resistor are connected in seriesacross a 25.0 V battery. A current of 4.0 A flows through the first resistor. What is the resistance of the second resistor?
vector a points in the negative y direction and has a magnitude of 4 units. vector b has three times the magnitude and
A 82-kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.5 s. at what average rate is he burning Calories
A father racing his son has three-fifths the kinetic energy of the son, who has two-fifths the mass of the father. What is the original speed of the father
Two diffraction patterns are formed on the screen. What is the distance between the common center of the diffraction patterns and the first occurrence of the spot where the dark fringe from one pattern falls on top of a dark fringe from the other p..
A 2.00-kg block is attached to the end of a horizontal ideal spring and rests on a frictionless surface. What will be the frequency when the block is displaced and released from rest again?
A particle moves along the x axis. It is initially at the position 0.180 m, moving with velocity 0.210 m/s and acceleration -0.210 m/s2. Suppose it moves with constant acceleration for 4.50 s.
An air-filled cylindrical inductor has 2500 turns, and it is 3.8 in diameter and 32.6 long. What is its inductance? How many turns would you need to generate the same inductance
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