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Part A
Approximately how long should it take 9.3 kg of ice at 0 °Cto melt when it is placed in a carefully sealed Styrofoam ice chest of dimensions 25 cm x 35 cm × 55 cm whose walls are 2.0 cm thick? Assume that the conductivity of Styrofoam is double that of air and that the outside temperature is 35 °C.
Express your answer using two significant figures.
a hammer strikes one end of a thick iron rail of length 8.5 m. a microphone located at the opposite end of the rail
A solenoid 10.0 cm in diameter and 69.9 cm long is made from copper wire of diameter 0.100 cm, with very thin insulation. What power must be delivered to the solenoid
A 600 turn solenoid is 15cm long. the current in it is 35A. a3.0cm long straight wire cuts through the center of the solenoid,along the diameter. the wires carries a 23A current downward. Whatis the magnitude of the force on this wire assuming the so..
Suppose one of the Global Positioning System satellites has aspeed of 4.46 km/s at perigee and a speed of 3.64 km/s at apogee. what is the corresponding distance at apogee
As part of a class project you are given 0.900 g of copper and asked to fabricate a wire with uniform cross-section. What length of wire do you end up with
What constitutes or composes of Kirchhoff's current law?
Consider a current carrying loop of wire. An electron is shotdirectly through loop's center perpendicular to the plane of theloop. What is the trajectory of the electron? Consider only themagnetic force here and no other forces.
scientists are experimenting with a kind of gun that may eventually be used to fire payloads directly into orbit. in
two narrow slits are illuminated by a laser with a wavelength of 545 nm. the interference pattern on a screen located x
Lodestone (magnetite), an igneous rock formed from molten material, is a natural magnet. How could lodestones become magnetized? What is the principle of an electromagnet?
A middle-aged man starts to wear eyeglasses with lenses of2.0 D that allow him to read a book held as close as 25 cm.Several years later, he finds that he must hold a book no closerthan 35 cm to read it clearly with the same glasses, so hegets new..
Dependence on crossover mechanism. In the simple model of sex, each bit is taken at random from one of the two parents, that is, we allow crossovers to occur with probability 50% between any two adjacent nucleotides.
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