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A ball of mass 0.140 kilogram is dropped from rest from a height of 1.25 meter. It rebounds from the floor to reach a height of 0.880 meter. Find what impulse was given to the ball by the floor? kg•m/s
What is average kinetic energy of each helium atom
the masses attached to each side of an ideal atwoods machine consist of a stack of five washers each of mass m as shown
A certain lightbulb has a tungsten filament having a resistance of 16 ? at 22°C and 155 ? when hot. Find the temperature of the filament when it is hot
A person bending forward to lift a load "with his back" (Figure (a)) rather than "with his knees" can be injured by large forces exerted on the muscles and vertebrae. The spine pivots mainly at the fifth lumbar vertebra, with the principal support..
identical 50uc charges are fixed on an x-axis at x -3.0 m. a particle of charge q-15uc is then released from rest at a
the outer surface the membrane of a spherical cell has a potential which is 60 millivolts higher than the inner
a helicopter moves in such a way that its position at any time is described by the horizontal and vertical equations x
Light of wavelength 418 nm is incident normally on a film of water 1.0 µm thick. The index of refraction of water is 1.33. What is the wavelength of the light in the water
A 0.170 kg tumour is being irradiated by a radioactive source. Each decay of the radioactive source produces a particle with an energy of 0.450 MeV. find the activity of the radioactive source
a point charge has a charge of -7.00 micro c. estimate the strength and direction of the electric field at a distance
A parallel plate capacitor has a potential difference between the plates of 80 V. what is the electrical energy stored by this capacitor
During normal operation, a computer's hard disk spins at 7200 rpm. what is the average angular acceleration of the hard disk
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