Homework Help for Physics (page 3260)
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A beam of light is sent directly down onto a glass plate(n= 1.5) and a plastic plate (n = 1.2) that forma thin wedgeof air (see the drawing). An observer looking downthrough the glassplate sees the fringe pattern shown in the lowerpart of thedrawing, with the dark fringes at the ends AandB. The wavelength of the light is 517 nm. Using the fringepattern shown in thedrawing, determine the thickness of the airwedge atB.
t = 12---Select---NnmAPaK
The iodine isotope 13153I is used inhospitalsfor diagnosis of thyroid function. If 612 Âµg are ingested by apatient, determine eachof the following. Use Appendix B.
(b) the activity 1.0 h later when the thyroid is being tested
(c) the activity 4 months later (use 30.5days/month in yourcalculation)
Two loudspeakers are placed on a wall 3.00 m apart. Alistenerstands 4.00 m from the walldirectly in front of one of thespeakers. A single oscillator isdriving the speakers at a frequencyof 700 Hz.
(b) What is the frequency closest to 700 Hz to which the oscillatormay beadjusted such that the observer hears minimal sound?
Light rays from the Sun, which is at an angle of 26Â° above thewesternhorizon, strike the still surface of a pond.
(b) What is the angle of reflection of the rays that leave thepondsurface?
(c) In what direction and at what angle from the pond surfacearethe reflected rays traveling?
---Select---eastwardwestwardat Â° above the pond surface
Find the number of moles of gas.
Find the finaltemperature of thegas.
Calculate the work done bythegas.
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