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An inkjet printer uses tiny dots of red, green, and blue ink to produce an image. Suppose that the dot separation on the printed page is the same for all colors. At normal viewing distances, the eye does not resolve the individual dots, regardless of color, so that the image has a normal look. The wavelengths for green, red, and blue are λr= 660 nm, λg = 550 nm, and λb = 470 nm. The diameter of the pupil during which light enters the eye is 2.0 mm. For a viewing distance of 0.40 m, what is the maximum allowable dot separation?
A student claims that if lightning strikes a metal flagpole, the force exerted by the earth's magnetic field on the current in the pole can be large enough to bend it. Typical lightning current are of the order of 10^4 to 10^5. Is the student's..
A charge of −1 Coulomb is placed at the 100-cm mark of the same meter stick. Elucidate is it possible to place a proton somewhere on the meter stick so that the net force on it due to the two charges is 0?
A spherical conducting shell of radius 25.0cm has a charge of -14uC on its outer surface and a charged particle in its hollow. What is the charge of the particle in the hollow
Two streams of air, one at 1 bar, 27C and velocity of 30 m/s and the other at 5 bar, 227C and 50 m/s velocity, Find the velocity of the stream issuing out of the nozzle
A nuclear power plant has a reactor that produces heat at the rate of 838MW. this heat is used to produce 253MW of mechanical power to drive an electrical generator. a) at what rate is heat discarded to the environment by this power plant? b) what..
a railroad train travels forward along a straight track at 70.00 ms for 2100m and then travels at 60.00 ms for the
A 24.0 kilogram gold bar at 27.0°C is located in a large, insulated 0.800 kg glass container at 15.0°C with 2.00 kilogram of water at 25.0°C. Compute the final equilibrium temperature
what is the bragg scattering angle for electrons scattered from a nickel crystal if their energy is each of the
A telescope can be used to enlarge the diameter of a laser beam and limit diffraction spreading. what is the minimum angular spread of the beam
The mass of the H2 molecule is 3.3x10-24 g. If 1023 hydrogen molecules per second strike 2.0 cm2 of wall at an angle of 45° with the normal when moving a speed of 105 cm/s
a 5.00 m length of 1.8 mm diameter wire carries a 700 ma current when 18.0 mv is applied to its ends. assume the drift
Water at a pressure of 3.2 atm at street level flows into an office building at a speed of 0.5 m/s through a pipe 5.6 cm in diameter. Calculate the water pressure in such a pipe on the top floor
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