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A circuit consists of an 100- resistor in series with a 5.5-?F capacitor, the two being connected between the terminals of an ac generator. The voltage of the generator is fixed. At what frequency is the current in the circuit one-half the value that exists when the frequency is very large? Note: The ac current and voltage are rms values and power is an average value unless indicated otherwise
The cable on an elevator of mass m snaps, and two safety mechanisms come into play. find an expression for the speed
A 47.0 kg woman stands up in a 70.0 kg canoe of length 5.00 m . She walks from a point 1.00m from one end to a point 1.00m from the other end. how far does the canoe move during this process
A point moves along the x-axis with its position, x, at time t given by x(t) = t3 - 3t2 + 2t - 1. Which of the following is the acceleration when t = 2?
A wheel free to rotate about its axis that is not frictionless is initially at rest. A constant external torque of +60 N·m is applied to the wheel for 18 s, Find the moment of inertia of the wheel.
A sled and rider with a combined weight of 59 kg are at rest on the top of a hill 10 m high. What is their total energy at the top of the hill
A 18.0-kg projectile is fired at an angle of 60.0° above the horizontal with a speed of 73.0 m/s. How much energy is released during the explosion
You're an optometrist, mounting a projector at the back of your 4.2m -long exam room, 2.6 m above the floor. At what height should you center the pattern on the wall
A sound wave with intensity 39 mW/m2 interferes constructively with a sound wave that has an intensity of 12 mW/m2. What is the intensity of the superposition of the two
a right- moving EM wave overlaps with a left-moving wave so in a certain region of space the total electric field in the y-direction, Determine the Poynting Vector
A scientific instrument that weighs 78.4 on the earth weighs 29.7 at the surface of Mercury. What is the acceleration due to gravity on Mercury
A 15 g rifle bullet traveling 205 m/s buries itself in a 3.4 kg pendulum hanging on a 2.6 m long string, which makes the pendulum swing upward in an arc. Find out the vertical and horizontal components of the pendulum's displacement.
Each railroad car has a mass of 91000 kg. Seven coupled railroad car moving with a speed of 4.9 m/s collide, What is the speed of all ten cars after the collision
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