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1. The Earth cools off a night more quickly when the weather is clear than when it is cloudy, why?
2. Describe why the temperature of a gas increase when it is adiabatically compressed.
3. Which will give the greater improvement in the efficiency of a Carnot engine, a 10 degrees C increase in the high -temperature reservoir, or a 10 degrees C decrease in the low- temperature reservoir?
A proton moves in a circular path perpendicular to a 1.18 T magnetic field. The radius of its path is8.50 mm. Calculate the energy of theproton in eV.
suppose the apparatus as used in this lab: A cube of mass M = 500 g and side length 30 mm is free to spin on an axis through the center of one face. A massless pulley on this axis has a diameter of 2r = 10 mm. An object with m = 50 g is hung from ..
A source delivers an AC voltage of the form ?v = 92.2 sin (60?t), Find the rms voltage of the source
A bag of blood with a density of 1050 kg/m^3 is raised about 1.00m higher than the level of a patient's arm. How much greater is blood pressure at the patient's arm than it would be if the bag were at the same height as the arm.
The Doppler effect using ultrasonic waves of frequency 2.25×10^6 Hz is used to monitor the heartbeat of a fetus. find the maximum velocity of the surface of the beating heart
nitrogen gas in an expandable container is cooled from 50.0degc to 10.0degc with the pressure held constant at 3.00 x
In 1911, Ernest Rutherford and his assistants Geiger and Marsden conducted an experiment in which they scattered alpha particles, What is the smallest distance between the alpha particle and the nucleus before the alpha particle reverses direction
A plano convex lens is placed convex side down on a plane glass plate and illuminated from the above with red loght of wavelength of 625nm. what are the curvature and focal length of the convex surface of the lens
1.0 kg block is at rest on a table. a 20.0 gr bullet is fired vertically up from under the table.the bullet goes
an infinite line of charge produces a field of magnitude 4.90 x 104 nc at a distance of1.9m. calculate the linear
An electromagnetic wave has an electric field strength of 145 V/m at a point P in space at time t. What is the electric field energy density at P
A vessel at rest explodes, breaking into three pieces. What are the direction and magnitude of its velocity immediately after the explosion
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