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An ideal heat engine with a Carnot efficiency of 38.9 % takes in heat from a high-temperature reservoir at 155oC. What is the Celsius temperature of the low-temperature reservoir?
There is a uniform magnetic field present, given by B=0.003 i + 0.004 j + 0.002 k, where i,j,k are the unit vectors along the cartesian coordinate axes in units of Tesla. Compute the y-component of the magnetic force acting on a segment of wire of..
A 13 kg dog is standing on the edge of astationary, frictionless turntable of rotational inertia 95kg·m2 and radius 2.05 m.The dog walks once around the turntable. What fraction of a fullcircle does the dog's motion make with respect to the ground?
A playground carousel is free to rotate about its center on frictionless bearings, and air resistance is negligible. What is the person's mass
molecules conserve energy and mometum when they absorb photons. an h2 molecule at 250k absorbs a uv photon with a
An object at rest on a flat, horizontal surface explodes into two fragments, one seven times as massive as the other. The heavier fragment slides 8.90m before stopping. How far does the lighter fragment slide?
a sketch the electric field in the interior and the exterior of a spherical metal shell 6 cm in radius if the shell has
An astronaut travels at a speed of 0.98c from the Earth to a distant star that is 6.4*1017 m away. If the astronaut is 26 years old when she begins her trip, how old is she when she arrives at the star?
Jupiter is 23.10 m/s2. What is the ratio of your speed on Jupiter to your speed on Earth when you have dropped 45.0 m? Overlook the effects of air resistance and suppose that you start at rest.
In an emergency, you need to run a radio that uses 39.3 W of power when attached to a 16.0 V power supply, how many series resistors should you use
Estimate the radiation pressure due to a 100 W bulb at a distance of 8.0 cm from the center of the bulb
A platinum resistance thermometer has resistances of 199.64 ? when placed in a 0°C ice bath and 266.19 ? when immersed in a crucible containing melting potassium. What is the melting point of potassium
A 500-gram mass is attached to a horizontal spring of spring constant 20 N/m and oscillates in simple harmonic motion on a frictionless surface. What is the total energy of the system
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