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Two kilograms of water at 19 degrees C is heated to 21 degrees C. What was the entropy change for the system (in J/K)?
the distance of light speed in a 24hr p. x 365 days up to 1 thousand years as a constant would equal a finite distance
An airplane traveling north at 400 m/s is accelerated due east at a rate of 50 m/s2 for 6 s. what is the final speed of the plane
Monochromatic light falls on two very narrow slits 0.050 mm apart. Determine the wavelength (in nm) and frequency of the light
An electron is accelerated to a speed where its total energy is 169 times larger than its rest energy. What is the speed of the electron in terms of the speed of light
A 5.00-N salmon swims 20.0m upstream against a current thatprovides a resistance of 1.50N. What is the total work that mustbe done by the salmon
A 400kg piano slides 4.0 m down a 30 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. Find out the force exerted by the man.
Space vehicles traveling through Earth's radiation belts can intercept a significant number of electrons, Find the resulting surface charge density
If a flea can jump straight up to a height of 22.0 , what is its initial speed as it leaves the ground, neglecting air resistance?
The centers of a 7.0kg lead ball and a 140g lead ball are separated by 13cm. What gravitational force does each exert on the other
The sun can be considered an ideal blackbody radiator at a temperature of 5900K, What is the peak wavelength of the distribution
You have a great summer job working in a cancer research laboratory. Your team is trying to construct a gas laser that will give off light of an energy that will pass by the skin but be absorbed by cancer tissue.
Red laser light of 630 nm is incident upon a diffraction grating. determine the angle from the incident ray of the first diffracted ray
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