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An electric fan is turned off, and its angular velocity decreases uniformly from 500 rev/min to 200 rev/min in 4.00 second. Determine the angular acceleration in rev/s2 and the number of revolutions made by the motor in the 4.00 s interval.
two spherical objects with a mass of 8.05 kg each are placed at a distance of 2.31 m apart. how many electrons need to
the plumbers handbook 8th edition p30 produced by the australian copper tubeindustry states that excluding fire
A jet plane lands with a speed of 98 m/s and can accelerate at a maximum rate of 5.90 m/s2 as it comes to rest. (a) From the instant the plane touches the runway.
A 0.43 kg air cart is attached to aspring and allowed to oscillate. The displacement of the air cartfrom equilibrium is x = (16.1cm) cos[(1.98s-1)t + π]. estimate the maximum force exerted on it by the spring
Fraunhofar double slit diffraction pattern is observed onthe focal plane of a lens of focal length 0.5m;wavelength ofincident light used is 500nm; Find the distance between their centres
A nitrogen molecule is initially in a large volume of calm air at STP. How many collisions does the nitrogen molecule suffer in 10 minutes
A spaceship takes a nonstop journey to a planet and returns in 100 hours according to a clock on the spaceship. how much time has elapsed the earth
Two parallel plates have a capacitance of 1.0 µF when they are 1.0 mm apart. The plates are then fully charged by a 9.0 V battery, What is the constant electric field strength between the plates
An electron moves in a circular path perpendicular to a constant magnetic field with a magnitude of 2.00 mT. The angular momentum of the electron about center of the circle is 5.50 multiplied by 10-25 J·s.
Suppose the initial speed of the proton in the figure is increased. Does the radius of each half-circular path segment increase, decrease, or stay the same?
A wave is moving along a string. The equation giving the displacement y of a point at coordinate x and at time t has the form y = 0.2cos(4pi(x)/5-20pi(t)), Calculate the frequency and the speed(m/s) of the wave
A 60g ball of clay is thrown horizontally at 10m/s toward a 1.8kg block sitting at rest on a frictionless hi surface. The clay hits and sticks to the block. What impulse does the block exert on the clay
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