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A concave mirror has a focal length of 34.1 cm. The distance between an object and its image is 52.8 cm. Find (a) the object and (b) the image distance assuming that the object lies beyond the center of curvature.
When jumping straight down, you can be seriously injured if you land stiff-legged. In a stiff-legged landing he comes to a halt in 4.59 ms. Find the magnitude of the average net force that acts on him during this time
A plane flying horizontally at a speed of 50.0 m/s and at an elevation of 160 m drops a package. How far apart will the two packages land on the ground (ignore air resistance)
A certain lightbulb has a tungsten filament having a resistance of18 Ω at 25°C and 150 Ω whenhot. Assume R = R0[1 +α(T - T0)] can be usedover the large temperature range here. Find the temperature of the filament when it is hot.
a 48 kg skier skis directly down a frictionless slope angled at 13deg to the horizontal. assume the skier moves in the
Solar energy is incident on the pond at an average rate of 400 . If the water absorbs all the solar energy and does not exchange energy with its surroundings, explain how many hours will it take to warm from 15 to 25 ?
A projectile is fired in such a way that its horizontal range is equal to 4.5 times its maximum height. What is the angle of projection?
You measure an angle of 21.3 when the light passes through a grating with 640 lines per mm. What is the wavelength of the light
an average human dna molecule contains 5 x 108 base-pairs each of which could be regarded as a rung on the dna ladder
molecules have additional degrees of freedom that atoms dont possess namely rotation and vibration. the energies
A circular platform is supported by 8 identical steel wires. The platform and its uniformly distributed load has a total mass of 3.7 kg. The breaking stress of steel is 7.50 x 108 pascals.
Peter, a 100kg basketball player, lands on his feet after completing a slam dunk and then immediately jumps up again to celebrate his basket. What is the impulse exerted on Peter during this 0.50s
A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. What is the mass of the wheel
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