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Two parallel slits are illuminated with light composed of two wavelengths, one of which is 645 nm. On a viewing screen, the light whose wavelength is known produces its third dark fringe at the same place where the light whose wavelength is unknown produces its fourth-order bright fringe. The fringes are counted relative to the central or zeroth-order bright fringe. What is the unknown wavelength?
The atmosphere of the sun consists mostly of hydrogen atoms (not molecules) at a temperature of 6000 K. What are the average translational kinetic energy per atom
Treating our rigid legged friend as a particle, what is the average force his feet exert on the ground as he slows down.
A motorboat heads due east at 11.00 m/s across a river that flows toward the south at a speed of 3.40 m/s. What is the resultant velocity relative to an observer on the shore? If the river is 1360m wide, how long does take the boat to cross.
A hollow cubical box is 0.30 m on an edge. This box is floating in a lake with one-third of its height beneath the surface. What is the depth of the water in the box at the instant the box begins to sink
We all sound like great singers in the shower, due to standing waves. Assume that your shower is 2.65 (about 8.72 ) tall and can be modeled as an organ pipe. What are the wavelengths of the first two overtones for this shower
an electron in a uniform electric field increases its speed from 2.3times107 ms to 3.7times107 ms over a distance of
What is the minimum (non-zero) thickness for the air layerbetween two flat glass surfaces if the glass is to appear dark when700 nm light is incident normally? What if the glass is to appear bright
While running, a man dissipates about 0.60 Joule of mechanical energy per step per kilogram of body mass. determine how fast is the man running
The Venturi tube shown in the figure below may be used as a fluid flowmeter. Find the fluid flow rate in cubic meters per second
a parallel-plate capacitor is connected to a 12.0-v battery. the area on each plate is 16 cm2 and the spacing between
A football coach in hopes of improving his kicker's performance fills a football with helium rather than air. what change in relative weight of the football
Two polaroid sheets are arranged so that their transmission axes are at 90 degrees to each other. What is the intensity of light leaving the final sheet
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