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Airflow through a long, 0.2 m^2 air conditioning duct maintains the outer duct surface temperature at 10 C. If the horizontal duct is uninsulated and exposed to air at 35 C in the crawl space beneath a home, what is the heat gain per unit length of the duct?
In the Millikan oil-drop experiment, Estimate the radius of an oil drop of density 839 kg/m3 for whichits weight could be balanced by the electric force of this field on one electron
A child of mass m rides on a Ferris wheel . The child moves in a vertical circle of radius13.8 m at a constant speed of 3.30 m/s. Calculate the magnitude of the force on the child
It is expected to measure an X-ray peak which occurs at an angle of around 31.6g. Alter viewing the scale and pointer, with what accuracy w ill you quote the result?
A mass m = 6.100kg is suspended from a string of length L = 1.310m. What is the angle theta between the string and the vertical
A BB gun shoots pellets so that their velocity is given by v = (-5.00 107) t 2 + (2.80 105) t, Determine the length of time the pellet is accelerated
A 4.70 kg mass causes a vertical spring to stretch 0.850 meters. The spring is after that stretch and extra 0.270 meters and release (as a stopwatch starts) causing the spring and mass to oscillate.
A racquetball with a diameter of 5.6 cm and a mass of 42 g is cut in half to make a boat for American pennies made after 1982. How many pennies can be placed in the racquetball boat without sinking it
Light of wavelength 550. nm in air is found to travel at 1.96x10^8 m/s in a certain liquid. Determine the frequency of the light in air
During the pitching motion, a baseball pitcher exerts an average og 60 N against the0.15kg baseball while moving it through a horizontal displacement of 2.0 m before he releases it
A ball traveling in a circle with a constant speed of 3 m/s has a centripetal acceleration of 4 m/s2. What is the radius of the circle
Amber (n = 1.546) is a transparent brown-yellow fossil resin. An insect, trapped and preserved within the amber, How far below the surface is the insect actually located
What is the longest wavelength of light that can be absorbed by a hydrogen atom that is initially in the first excited state
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