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A spinning flyer toy -a device which launches a fan-shaped object using torque -requires 2.9 s to reach an angular speed of 150 rev/min, and a rotational kinetic energy of 0.044 J in order to lift off of the base. What torque on the fan-portion is required to achieve liftoff?
An electron has an initial speed of 5.80×106 m/s. Find what potential difference is required to bring the electron to rest
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Sun is falling towards a supermassive black hole in the centre of a galaxy. At some point, the star will start to be torn apart; for what black hole mass M(crit) does this happen at the event horizon?
An ambulance is generating a siren sound at a frequency of 1,800 Hz. The velocity of sound is 335.0 m/s. What is the frequency of the siren perceived by the observer
In a series LRC AC circuit, the resistance is 19 Ohm, the inductance is 21 mH, and the capacitance is 14 micro Farads. Calculate the max current in the circuit
A ball is kicked toward a fence from a point 32 m away. The velocity of the ball as it leaves the kicker's foot is 24 meter per second at an angle of 37o above the horizontal. Find the time for the ball to reach the plane of the fence
A 9.0 kg dog takes a nap in a canoe and wakes up to find the canoe has drifted out onto the lake but now is stationary. What is the mass of the canoe
the planes speed when landing in still air is 20 m/s. what is the speed relative to the ground if it lands with the 10 m/s wind
A defensive lineman of mass M = 115 kg makes a flying tackle at vi \= 4.00 m/s on a stationary quarterback of mass m = 76 kg, calculate the shear stress exerted on the bone in the collision.
The resistance of a 9 H inductor is 90.0 ohms, What is the final steady current in the circuit
A football is kicked straight up into the air; it hits the ground3.4s later. What was the greatest height reached by the ball
Light from an argon laser strikes a diffraction grating that has 5330 grooves per centimeter. Determine the wavelength of the laser light
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