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A 4.0-m-long iron bar of uniform cross section is held perpendicular to the wall by a wire from the end of the bar to the wall. What is the tension in the wire if the iron bar weighs 689 N and the wire is 5.0 m long?
A diamond has a mass of 56.6 g and the gold ring it is set in has a mass of 125.6 g. How many carbon atoms are there compared to gold atoms
A space probe with a rest mass of 8.2*10^7kg and a speed of 0.5c smashes into an asteroid at rest and becomes embedded within it. what is the rest mass of the asteroid
A small plastic ball of mass m = 1.50 g is suspended by a string of length L = 24.5 cm in a uniform electric field, what is the net charge on the ball
Josh starts his sled at the top of a 3.0 m high hill that has a constant slope of 25°. After reaching the bottom, he slides across a horizontal patch of snow. How far from the base of the hill does he end up
A white light beam shines directly on a very thin oil film that floats on water, where the incident beam normal to the surface. Find the wavelength and color of the light
A professor's office door is 0.80 wide, 3.0 high, and 5.0 thick; has the mass of 25; and pivots on frictionless hinges. A "door closer" is attached to the door and the top of door frame.
Spaceman Spiff sits just outside the Milky Way galaxy with a cup of liquid Helium which is at approximately 4K (-269 degrees C). what is the latent heat of vaporization of liquid Helium
The car and minivan collide and stick together. Suppose the direction of the wreckage after the impact is 42.0° above the x axis.
A system does 167 J of work on its environment and gains 85.5 J of heat in the process, Find the change in the internal energy of the environment
A 2.0 kg box of running shoes slides on a horizontal frictionless table and collides with a 1.0 kg box of ballet slippers initially at rest on the edge of the table, at height h = 0.41 m. find their kinetic energy just before they strike the floor
Gold is the most ductile of all metals. For example, one gram of gold can be drawn into a wire 2.25 km long. What is the resistance of such a wire at 20°C
A force accelerates a body of mass M. The same force applied to a second body produces three times the acceleration. what's the mass of the second body
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