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A turbine fan in a jet engine has a moment of inertia of 2.5 kgm^2 about its axis of rotation. As it is starting up, the angular speed is w = (40 rad/s^3)t^2 Find the fan's angular momentum and the net torque acting on the fan as functions of time.
Calculate the acceleration of an electron that moves through the same magnetic field as in the example, as the same velocity as the proton
You are standing on a scale inside an elevator. The scale reads exactly your weight. What could be the velocity of the elevator, What is the acceleration of the elevator
The power of sunlight reaching each square meter of the Earth's surface on a clear day in the tropics is close to 1 000 W. On a winter day in Manitoba, the power concentration of sunlight can be 100 W/m2. Find the power per unit area used by the ca..
The burning of gasoline in a car releases about 3 × 10^4 kcal/gal. If a car averages 43 km/gal when driving 90 km/h, which requires 20 hp, what is an efficiency of the engine under those conditions.
A series ac circuit is shown. The inductor has a reactance of 80 Omega and an inductance of 200 mH. A 90- Omega resistor and a capacitor whose reactance is 130 Omega , are also in circuit. The rms current in the circuit is 1.3A. What is the phase ..
Iif the collision is perfectly elastic, what is the ball's speed immediately after the collision? Illustrate what is the maximum compression of the spring?
A boy is on a Ferris wheel, which takes him in a vertical circle of radius 5.5 m once every 21.0 s. What is the angular speed of the Ferris wheel
A musician plays a string on a guitar that has a fundamental frequency of 330.0 Hz. The string is 64.2 cm long and has a mass of 0.316 g. At what speed do the waves travel on the string
Two ideal polarizers A and B are aligned so that their transmission axis are vertical and horizontal respectively. Assuming that unpolarized light of intensity Io is incident upon the first polarizer (Polarizer A), find an expression for the light ..
The primary coil of a transformer has N1 = 4.00 102 turns, and its secondary coil has N2 = 1.20 103 turns. If the input voltage across the primary coil is ?v = (140 V) sin ?t, what rms voltage is developed across the secondary coil? V
The period of the moon (the time for a complete revolution) is 27.32 days, Determine the angular velocity of the moon
A rock stuck in the tread of a 63.0-cm-diameter bicycle wheel has a tangential speed of 2.80 m/s. What are the magnitudes of the rock's angular velocity and angular acceleration at t = 1.40 s
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