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A heat engine operates between two reservoirs at temperatures of 19.5oC and 313oC. What is the maximum efficiency possible for this engine?
A single loop of wire with a resistance of .3? and with a radius of 10 cm is laid flat in a magnetic field of 1.2 T out of the page. What is the induced current while its moving
The gravitational potential energy of all the water stored behind a very large dam is 1.2Ã-10^16 J, How far apart should you place the charges
In 1990 Walter Arfeuille of Belgium lifted a 281.5-kg object through a distance of 17.1 cm using only his teeth. How much work was done on the object by Arfeuille in this lift, assuming the object was lifted at constant velocity?
A particle of mass 2.4x10^-5kg and charge 3.0x10^-6C is accelerated from rest in a uniform electric field of 180 N/C. Find its acceleration in the electric field
A sample of wood from an archaeological excavation is dated by using a mass spectrometer to measure the fraction of 14C atoms. What is the wood's age
Describe an experiment to measure the molecular weight Mw and the second viral coefficient B of a macromolecules in solution using osmotic pressur. Show how you would plot the experimental data.
Car traveling east at 40m÷s passes atrooper hiding at the roadside.the driver uniformly reduces his speed to 25m÷s in3,5s....what the magnitude and direction of the car acceleratioas it slow down.
a ball of mass .150 kg is dropped from rest from a height of 1.25m. it rebounds from the floor to reach a height of 1.25 m. what impulse was given to the ball by the floor
A beam of ultraviolet radiation, with frequency of 2.710×1015 Hz is directed on a clean metal surface. Calculate the maximum kinetic energy for an electron dislodged from the surface by the radiation
A cockroach with mass m runs counter clockwise around the rim of a lazy Susan (a circular dish mounted on a vertical axle) of radius R and rotational inertia I with frictionless bearings.
Each second, a nuclear power plant generates 2000 MJ of thermal energy from nuclear reactions in the reactor's core. What is the maximum possible thermal efficiency of the power plant
Suppose you need to rotate the plane of polarization of a plane-polarized beam of light by 90 degrees and produce only a 10% loss in intensity, Find the angle between the successive polarizers
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