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A 4.0 m long horizontal boom (of negligible weight) can pivot at the wall to which it is attached and it is supported by a cable hooked 0.6 m from the far end that is at an angle of 37.2 degrees to the boom. A 2,200 N weight hangs at the end of the boom. Use the First and Second Conditions of Equilibrium to find:
(a) the tension i the supporting cable.
(b) the normal force of the wall pushing on the boom.
Neutron stars consist only of neutrons and have unbelievably high densities. Find the density of such a star
A uniform solid marble rolls down a symmetric bowl, starting from rest at the top of the left side of the bowl. How far will the marble go up the right side
The density of ice is 917 kg/m3 and the density of sea water is 1025 kg/m3. A swimming polar bear climbs onto a piece of floating ice that has a volume of 5.2m3. What is weight of the heaviest bear that the ice can support without sinking complete..
One mole of an ideal gas does 1408 J of work on the surroundings as it expands isother- mally to a final pressure of 1.6 atm and vol- ume of 29L. Find out the initial volume.
Your spaceship lands on an unknown planet. To determine the characteristics of this planet, you drop a 1.20 kg wrench from 3.00 mm above the ground, Express the planet's mass in terms of the earth's mass
A heat engine produces 9440 J. of heat while performing 2340 J. of useful work. What is the percent efficiency of this engine
A ball is thrown horizontally from a height of 16.2 m and hits the ground with a speed that is three times its initial speed. What was the initial speed?
What value does this give for the speed of sound in air. What is the speed of the ball at that point.
q1. a rectangular conducting loop of wire is approximately half-way into a magnetic ?eld b out of the page and is free
A proton is at the origin and an electon is at the point x = 0.41 nm, y = 0.36 nm. Find the electric FIELD at the proton,
When you push a 1.95kg book resting on a tabletop it takes 2.50N to start the book sliding. Once it is sliding, though, it takes only 1.50N to keep the book moving with constant speed. What are the coefficients of static and kinetic friction betwe..
If the water in the river is flowing at 3.0 m/s, explain how long does it take the boat to make a round trip consisting of a 250 m displacement downstream followed by a 250 m displacement upstream?
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