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The entrance to a large lecture room consists of two side-by-side doors, one hinged on the right and the other hinged on the left. Each door is 0.700 meter wide. Sound of frequency 607 Hertz is coming through from through the entrance from within the room. The speed of sound is 343 m/s. Find the diffraction angle θ of the sound after it passes through the doorway when
(a) one door is open and
(b) both doors are open?
A grating has exactly 7800 lines uniformly spaced over 2.63 cm, What is the expected angle for the third-order maximum of the green line
Batteries are recharged by connecting them to a power supply (i.e., another battery) of greater emf in such a way that the current flows into the positive terminal of the battery being recharged
A rectangular prism of plastic (ρ=600kg/m3)measuring 2cm x 2cm x 4cm is dropped into a bucket of gasoline(ρ+700 kg/m3). How much downward force, measured inN, would be required to push the plastic prism below the surface of the fluid?
Electrons are emitted when a metal is illuminated by light with a wavelength less than 381nm but for no greater wavelength. What is the metal's work function?
A glass sheet 1.40 ?m (micrometer) thick is suspended in air. Calculate the minimum value of the index of refraction of the glass sheet that produces this effect
The critical angle for a air-glass interface is 10.9 degrees.A ray in air is incident on the interface. The reflected ray is100% polarized. What is the angle of refraction?
question an object having mass 900 kg and traveling at speed 0.850c collides with a stationary object having mass 1 400
A series RCL circuit includes a resistance of 254, an inductive reactance of 865, and a capacitive reactance of 427. What is the voltage of the generator
A 3.1 kg block of copper at a temperature of 87oC isdropped into a bucket containing a mixture of ice and water whosetotal mass is 1.2 kg. How much ice was in the bucket before the copper block was placed in it
two particles are situated on the x axis. the particle q1 with 34 excess electrons is situated at the point x 100
a car is accelerating while its horn is sounding. just after the car passes a stationary person the person hears a
How long after the beginning of the power failure would it have taken the flywheel to stop if the power had not come back on? Explain how many revolutions would the wheel have made during this time?
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