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A wind turbine is initially spinning at a constant angular speed.As wing strength gradually increases, the turbine experiences aconstant angular acceleration of 0.160 rad/s^2. After moving 2821revolutions, angular speed is 135 rad/s
A) What was the initial angular velocity of the turbine (inrad/s)?
B) What was the time elapsed while the turbine is speeding up(in seconds)?
An ideally efficient airplane engine provides work as heat flows from 1400 K burned gases to 260 K air
A mechanic pushes a 2.40 103 kg car from rest to a speed of v, doing 4950 J of work in the process. During this time, the car moves 29.0 m. Neglecting friction between car and road,
If the rubber of the balloon itself has a mass of 2.00g and the balloon is filled with helium (density 0.166kg/m^3 ), calculate the net upward force (the "lift") that acts on it in air
Two capacitors are connected in parallel across the terminals of a battery. One has a capacitance of 2.0 µF, What is the voltage of the battery
A roller coaster at the Six Flags Great America amusement park in Gurnee, Illinois, incorporates some clever design technology and some basic physics. What is the radius of the arc of the teardrop at the top
A high-speed lifting mechanism supports a 745-kg object with a steel cable that is 31.0 m long and 4.00 cm2 in cross-sectional area. Determine the elongation of the cable
On earth, two parts of a space probe weigh 14000 N and 3500 N. These parts are separated by the center-to-center distance of 8m and may be treated as uniform spherical objects. Find out the magnitude of the gravitational force that each part exerts o..
A 0.20 kg block rests on a frictionless level surface and is attached to a horizontally aligned spring with a spring constant of 40 N/m. The block is initially displaced 4 cm from the equilibrium point and then released to set up a simple harmonic mo..
A ball is kicked with initial velocity of 14.9 m/s in the horizontal direction and 15.7 in the vertical direction. At what speed does the ball hit the ground
A solenoid is made of 400.0 turns of wire, wrapped around a hollow cylinder of radius 1.0 cm and lengh 5.0 cm. What is the self-inducatance of the solenoid
A nurse counts 60 heartbeats in one minute. What are the period and frequency of the heart's oscillations
Helium (He), a monatomic gas, fills a 0.012 m3 container. The pressure of the gas is 6.90x 10^5 Pa. How long would a 0.25 hp engine have to run (1 hp = 746 W) to produce an amount of energy equal to internal energy of this gas.
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