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The armature of an arc generator has 200 turns. Each turn is a rectangular loop with a cross section area of 0.02m^2. The armature rotates at a frequency of 60 Hz and generates a maximum voltage of 110V. What is the magnetic field strength?
An elevator at the CN Tower in Toronto, Canada, What is the minimal power required for the motor of the elevator
A baseball player hits a ball towards the outfield with an initial velocity of 76.0 m/s at an angle of 45 relative to the ground. The outfield is 118 m away and is 4.0 m tall.
define the magnitude of the acceleration of the block. What is the electric ?eld strength.
The convex lens of a copy machine has a focal length of 25 cm. A letter to be copied is placed 40.0 cm from the lens.
A 3.0 m tall, 64 cm diameter concrete column supports a 205,000 kg load. By how much is the column compressed
The volume control on a surround-sound amplifier is adjusted so the sound intensity level at the listening position increases from 21 to 59 dB. What is the ratio of the final sound intensity to the original sound intensity?
Four identical charged particles (q= +10.0µC) are located on the corners of a rectangle. find the direction of the total electric force exerted on the charge at the lower left corner by the other 3 charges
An electron and a proton are each accelerated through a potential dierence of 10.0 MV. Are the particles moving at relativistic speeds
A tuning fork with a frequency of 356 Hz is found to cause resonance in a closed column of air at 41 cm and at 65 cm. Find the velocity of sound produced by the tuning fork.
A glass window 0.45cm thick measures 90cm by 35cm . If the inside and outside temperatures differ by 18?, By what factor is the rate of heat transfer reduced
Suppose that a simple pendulum consists of a small 61 g bob at the end of a cord of negligible mass. find the pendulums maximum kinetic energy
An automobile tire has a radius of 0.335 m, and its center moves forward with a linear speed of v = 16.1 m/s. Determine the angular speed of the wheel
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