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Compare the torque-transmitting strength of a solid round shaft with that of a solid square shaft of the same size (circle diameter equal to side of square). Compare the weight of the two shafts and also the ratio of strength to weight.
A middle-aged man starts to wear eyeglasses with lenses of +2.0 D that allow him to read a book held as close as 25 cm. Several years later, What is the power of the new lenses
A car is moving on a flat horizontal circular track of radius 120 m. The speed of the car is constant, 15m/s. The mass of the car is 1200 kg. Ignore air resistance. What force is keeping the car in the circle?
Suppose a conducting rod is 86 cm long and slides on a pair of rails at 4.75 m/s. What is the strength of the magnetic field in T if a 5 V emf is induced
A bug is 10 cm from a diverging lens. The image is upright and magnified 1.5x. What is the focal length of the lens
A 53-kg woman contestant on a reality television show is at rest at thesouth end of a horizontal 149-kgraft that is floating in crocodile-infested waters. She and theraft are initially at rest. She needs to jump from the raft to aplatform that is ..
Determine the mass of the Sun using the known value for the period of the Earth and its distance from the Sun
Sand from a stationary hopper falls on a moving conveyor belt at the rate of 5.70 kg/s. Determine the force of friction exerted by the belt on sand
Assume the drag force from the water is linearly proportional to speed. Now what is the time required to bring the ship to a stop
As you sit on the porch, your 0.236 kg of cold water warms from 4 C to 23 C. How much heat flowed, and did it flow into our out of water
A satellite has a mass of 110 kg and is located at 1.96 106 m above the surface of Earth, What is the magnitude of the gravitational force on the satellite
9 grams of Alum at 200 C and 21 grams of Copper anre dropped into 50 cm^3 of Ethyl Alcohol at 15 C. what was the intitial temp of the Copper
The Raptor is an outside loop roller coaster in which riders are belted into seats resembling ski-lift chairs. Draw the Free-Body-Diagram of the rider at the highest position in the loop.
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