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A rod of proper length L moves past you a speed v. You reach out and grab the back end of the rod, bringing that point instantly to rest in your frame of reference. Assuming that this information, that the back of the rod has stopped, travels toward the front of the rod at the speed of light (it actually travels at the speed of sound), (a) show that for any v > a the length of the rod always extends beyond the proper length Lp before the front of the rod comes to rest and the rod assumes its proper length.
Aluminum wire has been utilized to replace copper wire during times of high copper prices. if 20 gauge copper wire has a resistance of33Ω per kilometre of length, decide the diameter of an aluminum wire with similar resistance?
Male Rana catesbeiana bullfrogs are known for their loud mating call. The call is emitted not by the frog's mouth but by its eardrums, which lie on the surface of the head. And, surprisingly, the sound has nothing to do with the frog's inflated th..
An experiment was performed where a quartz-iodine lamp was used to measure the photocurrent in microamperes in intervals of 10 nm from 400 nm to 900 nm for the voltage settings of 60, 80, 100, and 120V.
You are driving with a friend who is sitting to your right on the passenger side of the front seat of your car. what is the maximum radius you could make your turn and still have your friend slide your way
question a 15 g rifle bullet traveling 240 ms buries itself in a 3.9 kg pendulum hanging on a 2.9 m long string which
A particle moves along the x-axis. Its position varies with time according to the expression x(t) = -4t + 2t2, where x is in meters and t is in seconds. a) Determine the displacement of the particle in the two time intervals t = 0 to t = 1 s and t..
An electromagnetic wave with a frequency of 4.60×10^14 Hz propagates with a speed of 2.14×10^8 m/s in a certain piece of glass. Find the wavelength of the wave in the glass
The angle of incidence of a light beam in air onto a reflecting surface is continuously variable. find the index of refraction of the reflecting material
A lady ate a whole medium size pizza storing up 120 food Calories. This energy is used to heat up 2 liters of water from a certain initial temperature to a final temperature of 80 deg.C
Vertically polarized light with an intensity of .60 W/m^2 passes through a polarizer whose transmission axis is at an angle of 35 degrees with the vertical
A 0.078 kilogram mass hangs from a vertical spring. You throw the mass downward. The mass has a velocity of 3.40 m/s. Find how much work was done on the mass by the spring
A thick, vertical iron pipe has an inner diameter of 0.077 m. A thin aluminum (? = 23x10-6 (C°)-1) disk, What is the temperature of the aluminum disk when the disk falls into the pipe
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