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A 200 g cord is stretched over a distance of 5.2 mand placed under a tension of 500 N. Compute the speed of a transverse wave in the cord.
A near-sighted person's eyeglasses has a focal length of ? 22.0 cm, and the lens is 1.8 cm from the eye. If the person switches to contact lenses that are placed directly on the eye, what should be the focal length of the corresponding contact len..
a mass m at the end of a spring vibrates with a frequency of 0.92 hz. when an additional 609 g mass is added to m the
a heat engine operates between a hih temp reservoir at 610K and low temp reservoir at 320K. find the net change in entropy as a result of this cycle
A spring is compressed by 0.0617 m and is used to launch an object horizontally with a speed of 2.58 m/s. at what angular frequency (in rad/s) would it oscillate
A thin metallic spherical shell of radius 42.6 cm has a total charge of 6.95, What is the electric field at a distance of 14.4 cm from the center of the spherical shell
A high diver leaves the end of a 5.0 m high diving board and strikes the water 1.4 s later, 2.6 m beyond the end of the board. what is the angle with which she enters the water
Monochromatic light of variable wavelength is incident normally on a thin sheet of plastic film in air. The reflected light is a maximum only for 472.9 and 696.0 in the visible spectrum. What is the minimum thickness of the film.
A 5.60 uF parallel-plate air capacitor has a plate separation of 4.00 mm and is charged to a potential difference of 500V . Calculate the energy density in the region between the plates, in units of J/m^3
An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27°C. A 500-g sample of silver at an initial temperature of 85°C is placed in the water. Calculate the mass of the aluminum cup
in an electrically heated home the temperature of the ground in contact with a concrete basement wall is 12.0 oc. the
Suppose a heat engine pulls 3.37×104 J of work from the hot reservoir and 7.52×103 J of that energy is used to perform work. How much energy is rejected by the engine? (This energy is "exhausted" to the cold reservoir.) What is the efficiency of the ..
A particle whose mass is 2 kg moves in the xy plane with a constant speed of 3 m/s in the x direction along the line y = 5. What is its angular momentum (in kg×m2/s) relative to the origin
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