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Sound propagating during air at 30 degrees Celsius passes through a vertical cold front into air that is 4.0 degrees Celsius. if the sound has a frequency of 2400 Hz, by what percentage does its wavelength change in crossing the boundary?
A container of hot water at 80 degrees cools to 79 degrees in 15 seconds while it is placed in a room that is t 20 degrees. Use newton's law of cooling to estimate the time it will take for the container to cool from 50 degrees to 49 degrees.
A 1.3-kg 16-cm-diameter solid sphere is rotating about its diameter at 69 rev/min. what is the new angular speed of the ball
a research submarine has a 40cm diameter window that is 8.2cm thick. the manufacturer says the window can withstand
A 63.0 ?F capacitor is connected to a generator operating at a low frequency. The rms voltage of the generator is 4.00 V, at what frequency will the fuse burn out
A ball of moist clay falls 17.7 m to the ground. It is in contact with the ground for 15.0 ms before stopping. What is the average acceleration of the ball
A speck of clay of mass m = 0.01 kg strikes and stick to a wooden block of mass M = 0.99 kg, which rests on a frictionless horizontal surface and is attached to a spring with spring constant k = 100 N/m. The impact compresses the spring 10 cm. Fi..
After 35 minutes of running, at the 9km points in a 10km race, you find yourself 100 m behind the leader and moving at the same speed. what should your acceleration be if you are to catch up by the finish line? assume that the leader maintains a c..
you have a wire of length l 1.00 m from which to make the squar coil of a dc motor. the current in the coil is i1.75 a
Suppose a 1-meter-long bare expands 0.5 centimeters when heated. by how much will a 100-meter-long bar of the same material expand when similarly heated?
consider the earth/atmosphere/ionosphere as an equivalent RC circuit with a total resistance of 230 ohm and a total capacitance of 2.9F. how long does this amount of discharge take in hours
the total volume of a new house is 800 m3. before the heat is turned on the air temperature inside is 10degc and the
Fluids are examined.1) Part A- a raft floats and displaces 4.5 m^3 of water. The volume of the raft id 8 m^3 and its area is 10 m^2. When the tide is low the raft is attached to an anchor
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