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The Big Bang Theory states that the beginning of the Universe was accompanied by a huge burst of photons. Those photons are still present today and make up the so called cosmic microwave background radiation. The Universe radiates like a blackbody with temperature of about 2.7 K. Compute the peak wavelength of this radiation.
a cell membrane has a surface area of 1.00 x 10-7 m2 a dielectric constant of 5.68 and a thickness of 8.32 nm. the
The light emitted by a helium-neon laser has a wavelength of 632.8 nm in air. As the light travels from air into fused quartz, determine the wavelength in fused quartz
A 2.0-cm-diameter spider is 1.50m from a wall. Determine the focal length of a lens that will make a half-size image of the spider on the wall
two point charges are located on the x axis. the first is a charge q at x -a. the second is an unknown charge located
a 0.50 mm-wide slit is illuminated by light of wavelength 500 nm. what is the width of the central maximum on a screen
A propeller is modeled as five identical uniform rods extending radially from its axis. what is its rotational kinetic energy
A merry-go-round starts from rest and accelerates uniformly over 23.5 s to the final angular velocity of 6.55 rev/min.
A particle with charge of 16.1 µC is placed at the center of a spherical shell of radius 29.0 cm. find the total electric flux through the surface of the shell
a block of ice of mass 4.50 is placed against a horizontal spring that has force constant 150and is compressed a
A battery has an internal resistance of 0.75 ohm and an emf of 9 V. It is placed a cross a 5 ohm resistor and a 10 uF capacitor hooked up in parallel. a) after the capacitor has charged, what is the current through the resistor? b) what is the charge..
the normal force on the soles of your feet as you stand barefooted on a horizontal wood floor. it acts on your feet. it
Suppose the speeder is traveling with a constant speed of 25m/s , and that the maximum acceleration of the police car is 3.1m/s2. find the maximum head-start distance the speeder can have
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