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The human eye is mainly sensitive to 560 nm light. What is the temperature of a black body that would radiate mainly intensely at this wavelength?
A 13 g projectile traveling 153 m/spenetrates into a 0.25-kg wad of putty and emerges cleanly at28 m/s. how fast does it move after the projectile emerges
The primary coil of a step-up transformer is connected across the terminals of a standard wall socket, and resistor 1 with aresistance R1 is connected across the secondary coil.The current in the resistor is then measured.
What are the first, second, and third frequencies audible from a 20cm long organ pipe when (1) only one end is open and when (2) both ends are open. The speed of sound through the air inside the organ pipe is 343 m/s. (Hint: if a harmonic does not..
a soccer player kicks the ball toward a goal that is 27.0 m in front of him. the ball leaves his foot at a speed of
a 76 cm diameter loop is rotated in a uniform electric field until the position of maximum electric flux is found. the
Earth has a radius of 6.38 × 106 m, and is about 1.50 × 1011 m from the Sun. Mars has a radius of 3.40 × 106 m, what is the intensity of electromagnetic solar radiation at Mars
What is the speed of an electron with a de Broglie wavelength of 0.140nm and 0.140nm
When light of wavelength 350 nm is incident on a metalsurface, the stopping potential of the photoelectrons is 0.500 eV. What is the threshold frequency
A 4.00-m length of light nylon cord is wound around a uniform cylindrical spool of radius 0.500 m and mass 1.00 kg. How long does it take the spool to reach this angular speed
An ?-particle has a charge of +2e and a mass of 6.64 × 10-27 kg. find the magnitude of the magnetic force on it
A bare helium nucleus has two positive charges and a mass of 6.64 multiplied by 10-27 kg. What voltage would be needed to obtain this energy
A train engineer blows a whistle that has a frequecy of 4.0 X 10^2 hz as the train approaches a station. if the speed of the train id 25 m/s, what frequency will be heard by a person at station.
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