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Which of the following would have the highest power rating?
1. 100 joules of energy used in 0.5 seconds.
2. 500 joules of energy used in 0.5 seconds.
3. 100 joules of energy used in 0.25 seconds.
4. 500 joules of energy used in 0.25 seconds.
A 11.9-g mass is suspended 1.47 cm above a nonconducting flat plate, directly above an embedded charge of q. If the mass has the same charge, q, how much must q be so that the mass levitates (just floats, neither rising nor falling)? If the charge..
Halley's comet has a period of approximately 76 years, Estimate the comet's maximum distance from the Sun in astronomical units (AUs) (the distance from the Earth to the Sun)
Ligh of wavelength 248nm is directed onto the surface of a metal, what is the longest wavelength of light which will eject electrons from this metal
the click beetle can project itself vertically with an acceleration of about 400g an order of magnitude more than a
In the Millikan oil-drop experiment, an electric field of 1.92 x105 N/C is maintained at balance across two platesseparated by 1.50 cm. Find the potential difference between the plates
A 5.50-mol sample of H2 gas is contained in the left side of the container shown below, What is the entropy change of the gas
The planet Neptune has a satellite, Proteus, which travels in an orbit 1.180*10^8 m with a period of 1.12 days. Calculate the mass of Neptune
In a circus performance, a monkey is strapped to a sled and bothare given an initial speed of 2.0 m/sup a 16.0° inclined track. The combined mass of monkeyand sled is 24 kg, and the coefficientof kinetic friction between sled and incline is 0.20. How..
A woman and her dog are out for a morning run to the river, which is located 3.5 km away. The woman runs at 2.4 m/s in a straight line. What is the total distance run by the dog
A student moves a box of books by attaching a rope to the box and pulling with a force of 90.0 N at an angle of 30.0 degrees. Find the acceleration of the box
At T=20degreesC , how long must an open organ pipe be to have a fundamental frequency of 313Hz ? Q 2)If this pipe is filled with helium, what is its fundamental frequency
A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is usedin medical laboratories, for instance, to cause the more dense redblood cells to settle through the less dense bloo..
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