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A conducting rod is moving during a magnetic field, as in the drawing. The magnetic field strength is 0.65 T, and the speed of the rod is 4.8 m/s. Abruptly, the field strength decreases to 0.48T. To what value must the speed v of the rod be adjusted to re-establish the emf induced among the ends of the rod at its initial value?
The pressure inside a gas bottle at 25.5 °C is 3630 kPa. What will be the pressure inside the bottle
Calculate the length of the transmitter antennain order for it to be exactly one half the wavelength of this transmission frequency
A copper wire is stretched uniformly (maintaining constantdensity and resistivity) so that it is ten times its originallength (but of the same volume). by what factor is its resistance changed
A 60 gram iron at 60o C is dropped into 200 gram of water at 20o C, What is the final equalibrium temperature of the system
An object is in front of a converging lens with a focal length of 11.0 cm. The lens produces a real image located 25.0 cm from the lens. what is the image distance of the new lens
Two springs,each w/ spring constant 20N/m,connected parallel, & combination hung vertically one end.10-N weight is suspended from other end of combined spring
the electric field between two charged plates is approximately constant. this means that a charged particle between two
A 13kg box slides 4 m down the frictionless ramp , then collides with a spring whose spring constant is 180Nm.
Neutron stars consist only of neutrons and have unbelievably high densities. Calculate the density of such a star
At a certain location, the horizontal component of the earth's magnetic field is 4.90 10-5 T, due north. A proton moves eastward with just the right speed, so magnetic force on it balances its weight. Find the speed of the proton.
A 155 g copper bowl contains 245 g of water, both at 20°C. A very hot 300 g copper cylinder is dropped into the water, causing the water to boil, with 5 g being converted to steam. The final temperature of the system is 100°C. Neglect energy trans..
Two resistors of 20 ohms and 25 ohms are connected in parallel. find the potential difference across the third resistor
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