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venus has a period of revolution of 225 earth days. find the distance between the sun and venus as a multiple of earth's orbitial radius.
A coil is wrapped with 309 turns of wire on the perimeter of a circular frame (of radius 50cm). Each turn has same area, equal to that of the frame.
An object with mass 3.8{\rm kg} is attached to a spring with spring stiffness constant 220{\rm N/m} and is executing simple harmonic motion. When the object is 2.1×10?2{\rm m} from its equilibrium position, it is moving with a speed of 0.55 {\rm m..
A curve of radius 50 m is banked for the design speed of 100 km/h. If the coefficient of static friction is 0.60 (wet pavement), at what range of speeds can a car safely create the curve.
consider two blocks of wood, one having mass of 1 kg and the other having a mass of 2 kg. What is the net force of the bottom block
If the crate was at rest at the top of the incline and has a speed of 2.20m/s at the bottom, how much work Wf was done on the crate by friction
An object moves with constant acceleration 3.55 m/s2 and over a time interval reaches a final velocity of 12.8 m/s.
A science student is riding on a flatcar of a train traveling along a straight horizontal track at a constant speed of 11.5 m/s. How high does she see the ball rise
A cheetah is after its prey, which has a mass that is one-half that of the cheetah. When both start from rest, the cheetahsustains 2.50 times the acceleration as does its prey in the same time period.
A camera lens used for taking close-up photographs has a focal length of 21.5 mm. The farthest it can be placed from the film is 30.0mm. What is the closest object that can be photographed
A ball is thrown upward from the ground with an initial speed of 23.90 m/s; at = same instant, a ball is dropped from a building 16 m high. After how long will the balls be at the same height.
Light of wavelength 380 nm is incident on the face of a silica prism at an angle of 1 = 64.2 (with respect to the normal to the surface). Find the angle between the incident and emerging rays
A very powerful vacuum cleaner has a hose 2.69 cm in diameter. With no nozzle on the hose, what is the weight of the heaviest brick that the cleaner can lift?
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