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A 8.90-kg hanging object is connected by a light, inextensible cord over a light, frictionless pulley to a 5.00-kg block that is sliding on a flat table. Taking the coefficient of kinetic friction as 0.172, find the tension in the string.
scenarioa building has a single elevator at the atrium serving 4 floors.someone on the first ground floor who wants to
A soft foam pit is used for landing during the pole vault. The foam pit cushions the landing of the vaulted by:
If a nuclear power plant produces 1200 MW (Mega Watts) of electrical power and is 30% efficient, how much energy of fuel is consumed each day
The source of our Sun's energy is a series of fusionreactions. Mainly, four protons become a helium nucleus plus twopositrons, plus two neutrinos (which have no rest mass), plusenergy which is radiated.
What is the total emitted power and the net power loss due to radiation of a human body with a surface temperature of 36 degree C? Assume that the surface area of the body is 1.5m2 and the temperature of the surroundings is 20 degree C.
Two wires A and B are of same length and of same material having radii r1 and r2 respectively. Their one end is fixed with a rigid support and at the other end equal twisting couple is applied. Then ratio of the angle of twist at the end of A and ..
A car of mass 2000kg is lifted up a a distance of 30m by a crane in 1 min. A second crane does the same job in 2 min. Do the crane consume the same or diffrent amounts of fuels
A system consists of 3.0 kg water at 80 degrees Celsius 30 J of work is done on the system by stirring with a paddel wheel, What is the change in internal enery of the system
An archer pulls her bowstring back 0.370 m by exerting a force that increases uniformly from zero to 227 N. (a) What is the equivalent spring constant of the bow?
Consider a giant funnel that slopes at an angle of theta. the bottom has an area (a) equal to 3.0 x 10-4 m. Determine how long it takes for half of the water to drain
An aluminium cup contains 225 g of water and a 40 g copper stirrer, all at 27°C. A 430 g sample of silver at an initial temperature of 87°C is placed in the water. The stirrer is utilized to stir the mixture gently until it reaches its final equilibr..
A ship displaces 3.00*103 m3 of fresh water on a river. When is passes out to sea, find what volume of sea water will it displace
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