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A storage battery is connected to a motor, which is used to lift a weight. The battery remains at constant temperature by receiving heat from the outside air. Is this a violation of the second law? Why?
Al moves off with a speed of 8.98 m/sec in one direction and Jo moves off with a speed of 9.70 m/sec in the other. You can assume friction is negligible. What is Al's mass.
Wavelengths of light from a distant galaxy are found to be 0.5 percent longer than the corresponding wavelengths measured in a terrestrial laboratory. Determine is the galaxy approaching or receding from earth
the lead female character in the movie diamonds are forever is standing at the edge of an offshore oil rig. as she
A model rocket is fired upward. The rocket's average initial acceleration is 38.5 m/s2 until the fuel burns out in 0.825 s. How high does the rocket go
the earth completes a circular orbit around the sun in one year. the orbit has a radius of 93,000,000 miles. what is the speed of the earth around the sun in m/s? Report your result using scientific notation.
A car travelling 80 km/h slows down at a constant 0.50 m/s^2 just by "letting up on the gas." Compute the distance the car coasts before it stops in meters.
Calculate the adiabatic flame temperature attained when methane at 298k, is combusted (a) with oxygen in the molar ratio air/CH4 = 9.524. Assume that CO2 and H2O are the products of the combustion. The adiabatic flame temperature is that temperature ..
What is the porosity of a dry soil sample that weighs 500 gram (g) and has an undisturbed volume of 900 cubic centimeters (cm3)? Assume a particle density of 2.65 g/cm3.
a projectile is fired at v0342.0ms at an angle of theta72.3degrees with respect to the horizontal. assume that air
If white light illuminates a diffraction grating having 810 lines/mm , over what range of angles does the visible m = 1 spectrum extend?
The magnetic field changes uniformly from 0.40 T in the +x direction to 0.40 T in the -x direction in 2.0s. If the resistance of the coil is 16 Ω, at what rate is power generated in the coil during this change?
if a hot reservoir of an engine is 300k and cold reservoir 200k, what is the carnot efficiency of this engine
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