How many cubic yards of concrete are needed
A new sidewalk will be 6 ft wide, 220 ft long, and filled to the depth of 3 inches (0.25 foot) with concrete. how many cubic yards of concrete are needed?
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Two kids are on a merry-go-round. The boy, located 3m from the center of the merry-go-round, is feeling a centripetal acceleration of 2 m/s2. The girl 6m from the center. What is her centripetal acceleration? (Hint: both kids complete a cycle in t
The distance around a standard tennis court is 228 feet. If the length of the court is 6 feet more than 2 times the width, what are the dimensions of the court?
An isolated conductor has net charge +10*10^-6 C and a cavity with a point charge q=+3.0*10^-6 C. What is the charge on (a) the cavity wall and (b) the outer surface?
During each cycle, a refrigerator ejects 605 kJ of energy to a high-temperature reservoir, and takes in 545 kJ of energy from a low-temperature reservoir. (a) Determine the work done on the refrigerant in each cycle.(in KJ)
Why does the amplitude of the vibration of the LRC circuit change with frequency?
Nick has a goal to pay his credit card balance in full by June 30. It is now April, and he can pay all except $200. Evaluate his progress and describe the results.
What is the maximum possible coefficient of performance of a heat pump that brings energy from outdoors at -13.00°C into a 22.0°C house? Note that the work done to run the heat pump is also available to warm up the house.
An electromagnetic wave strikes a 2.40-cm2 section of wall perpendicularly. The rms value of the wave's magnetic field is determined to be 7.60 10-4 T. How long does it take for the wave to deliver 2350 J of energy to the wall?
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