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A step-up transformer has 20 turns on the primary coil and 720 turns on the secondary coil. If this transformer is to produce an output of 5100V with a 16-mA current, what input current and voltage are needed?
An artillery shell is launched on a flat, horizontal field at an angle of ? = 37.8° with respect to the horizontal and with an initial speed of v0 = 277 m/s. What is the horizontal distance covered by the shell after 9.26 s of flight? What is the ..
What is the mass of the liquid in the vat.
A cube of ice is taken from the freezer at -8.0 and placed in a 113 aluminium calorimeter filled with 306 of water at room temperature of 20.0. The final situation is observed to be all water at 15.0.
The distance between successive crests of a sound wave is 33m. what is the approximate frequency of the sound wave
A 5 kg mass is attached to a 1-m long string. If the speed of the mass at the bottom of the swing is 3 m/s, what it the force in the string at this point
What is coefficient of kinetic friction
The nucleus of a hydrogen atom is a single proton, which has a radius of about 1.2 × 10-15 m. What is the ratio of the density of the hydrogen nucleus to the density of the complete hydrogen atom
The hot resistance of a flashlight bulb is 1.90 , and it is run by a 1.53 V alkaline cell having a 0.100 internal resistance. Calculate the power supplied to the bulb
two sheets of aluminum foil have a separation of 1.20mm a capacitance of 9.7pF and are charged to 13.0v, the separation is now decreased by 0.10mm with the charge held constant. Find the new capacitance
In an open RC circut, the total resistance is 15Kohms and the battery emf is 24 and constant is measured to be 35 microsecond calculate (a) the total capacitance of the circuit
Two large equipotent surfaces are flat and parallel and separated by a relatively small distance compared to their size. One surface is at 25 V and the other is at 33 V. The surfaces are 1.25 cm apart. What is the direction of the electric field m..
A potter's wheel moves uniformly from rest to an angular speed of 0.18 rev/s in 28.0 s, Find its angular acceleration in radians per second per second
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