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A wifi laptop is placed on a metal stand that sits on a polypropylene (pp) utility cart (rated 0-200 degrees F). The cart heats up around the perimeter. What type heat is being emitted from the cart? Please Explain.
A block with a mass of 15killogram is held stationary by a cord on a frictionless plane that is inclined at an angle θ=27 degree. find the acceleration of the block as it slides down the inclined plane
how much kinetic energy does each electron have. Blocks of mass m_1 and m_2 are connected by a massless string that passes over the pulley.
Elizabeth is nearsighted. Without glasses, she can see objects clearly when they are between 15.0 cm and 90.0 cm away from her eyes. how close to her eye can an object be before it appears out of focus
On August 19,1987, Alessandro Andrei set a world record in the shot put with a throw of 22.9 m (75 ft 2 in.). What was the maximum height the projectile reached above the ground
Bats emit a wide variety of sounds, one type emits pulses of sound having a frequency between 39kHz and 78kHz. What is the range of wavelengths of this sound in air
The wavelength of a spectral line measured to he lambda on I Earth is found to increase by 50% on a far distant galaxy. What is the speed of the galaxy relative to earth?
a power transmission line feeds input power at 2300 v to a stepdown transformer with its primary windings having 4000
A moving particle encounters an external electric field that decreases its kinetic energy from 9910 eV to 6840 eV as the particle moves from position A to position B. Determine the charge of the particle
A 20.0-kg sled is being pulled across a horizontal surface at a constant velocity. Determine the coefficient of kinetic friction
Two cars are travelling on a dirt road between 3 consecutive poles after 5.40s they are side by side at next telephone pole. The distance between the poles is 66.30m.
A light ray traveling in air enters diamond with an angle of incidence of 35o. The refracted angle inside the diamond is 13.7o. Find what is the index of refraction of diamond
A 35 g bullet moving at 475 m/s strikes a 4.20 kg bag of flour that is on ice, at rest. The bullet passes through the bag, leaving at 270 m/s. How fast is the bag moving when the bullet exits.
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