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An unknown metal alloy is being tested to discover its thermal properties to see if it is suitable for use as a component in an aircraft wing. The alloy is formed into a bar measuring 1 meter in length, and is then heated from its starting temp. of 30 deg. C to a final temperature of 100 deg. C. The length of the heated bar is measured to be exactly 1.002 meters in length. what is the coefficient of thermal expansion of the alloy?
A 75-W, 120-V bulb is connected in parallel with a35-W, 120-V bulb. What is the net resistance
a magnetic field is perpendicular to .04 by .06 m a rectangular coil of wire that has one hundred turns in a time of .05s, Calculate the change in the magnetic field
two 8ohm resistors are connected in parallel, as are two 4 ohm resistors. these two combinations are then connected in series in a circuit with a 12 v battery, estimate the voltage across each resistor
The triceps muscle in the back of the upper arm extends the forearm. What is the moment of inertia of the boxer
While taking photographs in Death Valley on a day when the temperature is 58.0°C, What current does he register there if the temperature is -88.0°C
The owner of a van installs a rear-window lens that has a focal length of -0.300 m. How far from the van is the object actually located
A sprinter explodes out of the starting block with an acceleration of 4m/s^2, which she sustains for 3 seconds. What is the length of the race
Find the angle required to produce this alignment of . (Assume the pulleys are ideal.) Find out the magnitude of the force, that is applied to the femur in this case.
a large 6.0g hailstone of ice at 0.0 celsius falls 150m and undergoes a completely inelastic collision with the earth. what is the speed of the stone as it hits the earth
A heat engine takes in 126 kJ of heat from a reservoir at 820 K and exhausts 88 kJ to a reservoir at 292 K. What is the efficiency of an ideal engine operating between the same two reservoirs
Earth has a net charge that produces an electric field of approximately 150 N/C downward at its surface. (a) What is the magnitude and sign of the excess charge, noting the electric field of a conducting sphere is equivalent to a point charge at i..
A boxcar of mass 5.32 x 10^4 kg is rolling south at 3.49 m/s when it collides and couples with another boxcar that is rolling north at 5.12 m/s. Find the mass of the boxcar
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