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Would you be willing to back financially an inventor who is marketing a device that she claims takes in 25000J of heat at 600K, expels heat at 300K, and does 12000J of work? Explain.
an ac generator consists of 6 turns of wire. each turn has an area of 0.040m2. the loop rotates in a uniform field
two neutral metal spheres on wood stands are touching. a negatively charged rod is held directly above the top of the
A rocket blasts off vertically from rest on the launch pad with an upward acceleration of 2.30. At 10.0 after blastoff, the engines suddenly fail, which means that force they produce instantly stops.
It is claimed that a black hole is so strong in its gravitational pull that even light cannot escape from it. However, if the speed of light, and gravitational forces are constant, then light should be able to escape from the black hole if it can ..
An inductor with an inductance of 2.90H and a resistor with a resistance of 6.00? are connected to the terminals of a battery with an emf of 4.00V, Find the initial potential difference across the inductor
work of 600 j is done by stirring and insulated beaker containing 100 gm of water?what is the internal enery of the
A certain LCD projector contains a single thin lens. An object 29.5 mm high is to be projected so that its upright image fills a screen 2.52 m high. Find the focal length of the projection lens
Airtight box has a removable lid of area 1x10-2m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 0.85x 10^5Pa. The inside of the box is completely evacuated. What is the magnitude of the force essen..
A wire loop of radius 0.1 m has a 2-ohm resistance. A uniform magnetic field perpendicular to the plane of the loop increases from zero to 2 T in 0.01 s
A grinding wheel 0.45 in diam rotates at 2900. What is acceleration of a point on the edge of the grinding wheel.
Two different simple harmonic oscillators have the same natural frequency (f=7.10 Hz) when they are on the surface of the Earth. Calculate the new frequency of the pendulum
A warehouse workerpushes a crate along the floor by a force of 29.0 N that points downward at an angle of 50.0^\circ below the horizontal. Find the vertical component of theforce
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