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A thermodynamic system undergoes a process in which its internal energy decreases by 455 J. Over the same time interval, 236 J of work is done on the system. Find the energy transferred from it by heat.
A pyramid has a square base and four faces which are equilateral triangles. A charge Q is placed on the center of the base of the pyramid, What is the net flux of electric field
The projection lens in a certain slide projector is a single thin lens. A slide 24.6 mm high is to be projected so that its image fills a screen 1.78 m high. Determine the focal length of the projection lens
Two small metal spheres with masses 2.0 {rm g} and 4.0 {rm g} are tied together by a 5.3-{rm cm}-long massless string and are at rest on a frictionless surface. Each is charged to +2.3 mu C. What is the energy.
A 61.0 kg skier encounters a dip in the snow's surface that has a circular cross section with a radius of curvature of 12.0 m .If the skier's speed at point A is 7.50 m/s (before entering dip), what is the normal force exerted by the snow on the skie..
Consider a sunspot with measured field strength 1000 Gauss. Assume the ratio of the total brightness of the gas at the center of the sunspot, Determine the temperature of the gas inside and outside the sunspot
A uniform ring with a radius of 2.15 cm and a total charge of 6.37 ?C rotates with a constant angular speed of 3.84 rad/s, What is the magnetic moment of the rotating ring
A potential difference is applied between the electrodes in a gas discharge tube. In 1.7 s, 3.2 1016 electrons, What is the current in the tube
A uniform rod of length 0.790 m and mass 14.50 kg is balanced on a sharp edge at 0.650 m from the left end. At the left end hangs a mass of 45-kg and the right end hangs an unknown mass so that the whole assembly is in equilibrium.
The population of a community was 12500 in 1985 and 36000 in 2000. Find the time it takes the population of this town to double
Calculate each star's speed, and state whether it is moving toward or away from us.
A parallel plate capacitor has plates 5.0cm by 4.5cm. The plates are seperated by 1.8mm thickness of paper. (dielectric constant=3.7), obtain the energy stored in the capacitor.
A 1.78 m long wire carrying a current of 1.65 A forms a 5-turn loop in the shape of an equilateral triangle. determine the maximum torque that acts on it
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