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What do you mean by work? Give the physical significance of work in our uses? Is this useful any where in our lives? Explain in well defined lines
An ideal Carnot engine operates between reservoirs having temperatures of 125°C and - 20°C. Each cycle the heat expelled by this engine is used to melt 30.0 g of ice at 0.00°C. How much work does this engine do each cycle
A charge of -2.300 µC is located at (3.055 m, 4.501 m), and acharge of 1.800 µC is located at (-2.102 m, 0). Find the electric potential at the origin
A semicircular section of roller coaster track (Radius=34m) is designed to be able to provide up to 140kN (1.4x10^5N) of support (upward normal force) for coasters without collapsing.
A laser is mounted on a table 1.00m above the ground, pointed at a vertical mirror a horizontal distance 3.48maway. At what height does the reflected beam strike the wall
The hydrogen bomb detonated in 1954 had an explosive power equal to about 15 megatons of TNT, How many times more explosive was the hydrogen bomb
A neophyte mechanic foolishly connects an ammeter with 0.125 ohm resistance across a 12 V car battery whose internal resistance is 0.010 ohm. What is the power dissipation in the meter
A woman walks for 4 minute directly north with an average velocity of 6km/h; then she walks eastward at 4 km/h for 10 minute. Find her average speed for the trip
A lawn mower has a flat, rod-shaped steel blade that rotates about its center. If all of the rotational kinetic energy of the blade could be converted to gravitational potential energy, to what height would the blade rise
Obtain the wavelength in vacuum for blue light, whose frequency is 6.58 1014 Hz
Determine the tangetial and centripetal components of the netforce exerted on the car when its speed is 15 m/s. The car's massis 1100 kg
Two people, one of mass 88kg and the other of mass 62kg , sit in a rowboat of mass 68kg. With the boat initially at rest, In what direction will the boat move
Two parallel plates each of area 7.00 cm^2 are seperated by 3.50 mm of water The electric field between the plates has a magnitude of 2290 N/C, what is the charge stored on each plate
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