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Two rods of equal length (0.55m) and diameter (1.7cm) are placed end to end. One rod is aluminum, the other is brass. If a compressive force of 8400 N is applied to the rods,
(a) how much does their combined length decrease?
(b) Which of the rods changes its length by the greatest amount? Explain.
A baseball leaves the bat at a height of 4 feet above theground, traveling at an angle of 45 degrees with the horizontal, Will the hit be a home run
A spring is hung from the ceiling. A 0.375 -kg block is then attached to the free end of the spring. Find the angular frequency of the block's vibrations
The drawing shows three different resistors in two different circuits. The battery has a voltage of V = 27 V, and the resistors have resistances of R1 = 50.0 ?, R2 = 25.0 ? and R3 = 10.0 ?. What is the total power supplied to the two resistors
if you know the temperature of a star how would you find its wavelength? say the temperature of a star is 30000k what
How do paramagnetic materials differ from diamagnetic materials?
A car is traveling at 27 m/s when the driver spots a large pothole in the road a distance 44 m ahead. She immediately applies her brakes. If her acceleration is -9.7 m/s2, does she arrange to stop before reaching the pothole.
A researcher heats a 100g piece of unknown material to 150 C,and then drops it into an insulated cup holding 300g of water at25C. What is the specific heat of the material
Assuming no heat loss to the surrounding environment, determine the minimum duration of time necessary for a 100 W aquarium tank heater to raise the temperature of 20.0 gallons of water by a difference of 10.0°C.
A family goes on vacation for one week, but forgets to tun off an electric fan that consumes electricity at the rate of 200 Watts. how much does it cost to run the fan during this time
As it enters a pipe, a perfect fluid has spped 3.70 m/s. As it exits the pipe, the speed is 10.6 m/s. what is the radius of the pipe at the exit
An electron moves in the xy plane with a speed of 3.75 x 106 m / s at an angle 600 with the x-axis 300 and the axis. A magnetic field of 0.85T is in the positive direction of axis y. Find the magnetic force on the electron.
A circular wine barrel 75 cm in diameter will burst if the netupward force exerted on the top of the barrel is 6490 N. What weight of water must be poured into the tube
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