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Outer space is filled with a sea of photons, created in the early moments of the universe. The frequency distribution of this "cosmic background radiation" matches that of a blackbody at a temperature near 2.7 K.
a) What is the peak frequency of this radiation?
f(peak)= _____ Hz
b) What is the wavelength that corresponds to the peak frequency?
lambda= _____ mm
A 1300 nF capacitor with round parallel plates 1 cm in radius is accumulating charge at the some unknown rate at time t0. What is the changing rate of the charge
Derive an equation for the magnitude and direction of the electric field along the x axis. (Hint there is a point on the negative x axis where the electric field is zero)
A skier starts from rest at the top of a hill that is inclined at 10.5? with the horizontal. The hillside is 191 m long, and the coefficient of friction between snow and skis is 0.0677. At the bottom of the hill, the snow is level and the coef..
An electromagnet is made by inserting a soft iron core into a solenoid. The solenoid has 1800 turns, radius 2.0 cm, and length 25 cm. What is the relative permeability KB of the iron core
A radar system can measure the time delay between the transmitted and reflected wave pulses from a distant airplane with an accuracy of 1.02 picoseconds. What is the accuracy in the calculated distance to the plane
A child in a boat throws a 5.20 kg package out horizontally with a speed of 10.0 m/s. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 26.0 kg and that of the boat is 40kg.
An automobile with a mass of 940 kg goes around a curve with a radius of 64m.The coefficient of friction between the tires and the road is 0.700. Illustrate what is the maximum speed with which the car can go around the curve ?
he box is taken up a mountain where the air pressure outside the box is 8.00 104 Pa. The inside of the box is completely evacuated. Illustrate what is the magnitude of the force required to pull the lid off the box?
A sample of the radioactive nuclide is prepared that has an initial activity of 7.28×1011 .92.4 after the sample is prepared, What is the half-life of this nuclide
A 13.9-mW vertically polarized laser beam passes through a polarizer whose polarizing angle is 26.7° from the horizontal. What is the power of the laser beam when it emerges from the polarizer
A computer can fetch information from the memory in 3.0 ns, a process that involves sending a signal from the Central Processing unit (CPU) to memory and awaiting return of the information. find the maximum distance between the CPU and the memory
A 3.42 g plastic bead charged to -3.61 nC and a 6.84 g glass bead charged to +7.22 nC are 5.26 cm apart, What is the acceleration (in m/s/s) of the plastic bead
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