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The engine of an aircraft propeller delivers an amount of power 171hp to the propeller at a rotational velocity of 2360 rev/min the torque= 516 Nm
How much work does the engine do in one revolution of the propeller?
A uniform plank of length 5.0 m and weight 225 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support. To what distance x can a person who weighs 415 N walk on the overhanging part of the plank before it just ..
A flywheel having constant angular acceleration requires 4.40s to rotate through 169rad . Its angular velocity at the end of this time is 110rad/s. find the angular acceleration of the flywheel
A solenoid 10.0 cm in diameter and 75.4 cm long is made from copper wire of diameter 0.100 cm, What power must be delivered to the solenoid if it is to produce a field of 7.60 mT at its center
Two plastic semicircular rods are arranged into a complete circle with radius 8.5cm. The top half has charge of +15 pC, and the bottom half has charge of -15pC. Determine the magnitude and direction of the electric field at the center of the circl..
A ball of weight 1.5 N is thrown at an angle of 30° above the horizontal with an initial speed of 12 m/s. the net force (ignoring air resistance) on the ball is:
Two indentical spaceships are travelling in the same direction. an observer on earth measure the first to have a speed of 0.80c, what is the speed of second spaceship
System A has a temprature of TA = 300K and Ua = 30 MJ/kmol. System B has tempratuer TB = 200K and UB = 60MJ/kmol. Describe (qualitatively) the final (equilibrium) state of the combined system
calculate and compare the energy released by (a) fusion of 1 kg of hydrogen deep within the sun and (b) the fisision of 1 kg U235 in a fission reactor
Your toaster has a power cord with a resistance of 2.2×10?2 connected in series with a 9.9 nichrome heating element. How much power is dissipated in the heating element
A model rocket engine has an average thrust of 5.26 N. It has an initial mass of 25.9 g, which includes fuel mass of13.4 g. What is the average exhaust speed of the engine
a 60 g tennis ball traveling at 30m/s strikes a wall, What is the magnitude of the impulse in the ball
Two spherical objects with a mass of 5.26 kg each are placed at a distance of 3.95 m apart. How many electrons need to leave each object
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