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The temperature of a black body is increased by 10.5 percents. By how many percents did the total emitted power change?
By how many percents did the wavelength of the peak change?
a rod of length L lies along the x-axis between x=A and x=A+L. The rod has a non-uniform charge density, What is the magnitude of the electric field at the origin
Two strings are adjusted to vibrate at exactly 188 Hz. Then the tension in one string is increased slightly. What is the new frequency of the string
A stone of mass 0.31 kg is tied to a string of length 0.85 m and is swung in the horizontal circle with speed v. The string has a breaking-point force of 90 N. What is the largest value v can have without string breaking.
A steel bicycle wheel (without the rubber tire) is rotating freely with an angular speed of 14.9 rad/s. What is the angular speed of the wheel at the higher temperature
If a metric ton is 1.000 x10^e3 kg, how many 74 kg people can safely occupy an elevator that can hold a maximum mass of accurately 1 metric ton.
A block of mass m1 = 0.57kg is placed on top of another block of mass m2 =0.97kg, What minimum coefficient of static friction between the two blocks will prevent the upper one from slipping
A missile of mass 1.20 102 kg is fired from a plane of mass 4.85 103 kg initially moving at a speed of 3.35 102 m/s. what is the final velocity of the plane?
A 2.11-cm2 wafer of pure silicon is irradiated with electromagnetic radiation having a wavelength of 775 nm. How many electron-hole pairs are produced in one second
Tarzan spies a 40kg chimpanzee in severe danger, so he swings to the rescue. He adjusts his strong, but very light, What are the frequency of Tarzan's swing
A 76 kg sprinter starts a race with an acceleration of 5.8 m/s2, What is the magnitude of the net external force on him in N
find the following for the time at which the cart is at position P2, with one-third of the loop in the magnetic field.
In a hot star, because of the high temperature, an atom can absorb sufficient energy to remove several electrons from the atom. Find the wavelengths of the next three spectral lines nearest to the line of longest wavelength
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