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A fan is rotating at a rate of 740 rpm. When the motor is turned off, the blades slow to rest in 2.5 s. What is the angular acceleration of the blades as they slow down?
An object is placed 3.9m from a lens with a focal length of -5.1 m. Determine the resulting image distance and magnification
Suppose the temperature of 4.56 L of ideal gas drops from 359 K to 275 K. Find the number of moles of gas
A rail gun accelerates a projectile from rest by using the magnetic force on a current-carrying wire. The wire has radius r = 4.3 10-4 m and is made of copper having a density of ? = 8960 kg/m3. Calculate the final speed of the wire as it leaves th..
A copper wire has a length of 50 meters and diameter of 1.6 mm. Copper has a resistivity of 1.68 x 10^-8 ohm. Calculate the resistance of the wire
An automobile tire is rated to last for 40,000 miles. To an order of magnitude, through how many revolutions will it turn?
Two point charges are separated by d= 10 cm and have charges of q1= +2(mu)C and q2= -2 (mu)C, respectively, What is the magnitude of the electric force between the two charges
A cart is driven by a large propeller or fan, which can accelerate or decelerate the cart. The cart starts out at the position x = 0 m, calculate the acceleration of the cart
A box is placed on a conveyor belt that moves with a constant speed of 1.05. The coefficient of kinetic friction between box and belt is 0.80. How much time does it take for the box to stop sliding relative to belt.
A pulsar is a rapidly rotating neutron star that emits a radio beam the way a lighthouse emits a light beam. What is the pulsar's angular acceleration
An 11.2 kg box is pulled at a constant velocity across a rough level floor by a 317 N force F directed 23.5o above the horizontal, through a displacement x of 5.65 m. How much net work is done on the box
Two charges, qA and qB, are divided by a distance, d, and exert a force, F, on each other. Analyze Coulomb's law and answer the following questions.
A rifle is aimed horizontally at a target 1,699.92 m away. The bullet hits the target 2.18 inch below the aim point. determine the bullets time of flight
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