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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 projectile is launched above the ground with an initial speed of 50 m/s at an angle of 60 degrees above the horizontal.The range is 475 m. What is the height of the launch position?
Darius the dare devil plans to launch his rocket car at the top a ramp inclined at 20.0 degrees to the horizontal over a pit of fire 20 m in diameter, Where will he land
A soldier has a huge contraption that notches a large 4 kg arrow (it looks more like a lance) in a massive bow and uses a winch system to draw the arrow back to set the bow. What is the speed of the arrow
What is the tangential acceleration of a bug on the rim of an 11.00 in.-diameter disk if the disk accelerates uniformly from rest to an angular speed of 79.03 rev/min in 3.60 s? One second after the bug starts from rest, what is its centripetal accel..
Find the far point of an eye for which a prescribed lens has an optical power of -0.62 d
A solid disk (mass = 5 kg, R=0.6 m) is rolling across a table with a translational speed of 9 m/s. What is the total kinetic energy of the disk
John is farsighted and cannot see objects clearly that are closer to the eye than 65.0 cm. What is the focal length of the contact lenses
The current from an AC source is given by: I(t) = 6.50 sin(84.0 t + 1.090 ) mA, What would the phase shift be in degrees
A cylinder of mass10.0kg rolls without slipping on a horizontal surface. What is the rotational kinetic energy about its center of mass
A satellite has a mass of 6079 kg, What would be the true weight of the satellite if it were at rest on the planet's surface
A massless spring hangs from the ceiling with a small object attached to its lower end. How far below yi is the new equilibrium (rest) position with both objects attached to the spring
A typical coal-fired power plant burns 340 metric tons of coal every hour to generate 750MW of electricity. 1 metric ton= 1000 kg. What is the power plant's thermal efficiency
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