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Light of wavelength 800nm is incident on a metallic surface. if the stopping potential for the photo-electrons ejected from the metal is 0.35 volts, find the work function for the metal and the longest wavelength incident light that will eject photo-electrons from this metal.
To fill a child's inflatable wading pool you use a garden hose with a diameter of 2.9 cm. How long will it take to fill the pool to a depth of 19 cm if it is circular and has a diameter of 2.4 m
Earth has a net charge that produces an electric field of approximately 150 N/C downward at its surface. find the magnitude and sign of the excess charge
A 4.90-kg ball, moving to the right at a velocity of +2.14 m/s on a frictionless table, Find the magnitude and direction of the final velocity of the two balls if the collision is completely inelastic
Compute the value of Ra in terms of R1 and R2. how much energy must be added to a 2-kilogram pile of it to increase its temperature from 40*c to 50*c.
During an eclipse, the Sun, Earth, and Moon are arranged in roughly a straight line. Calculate the percentage change in your weight when going from one type of eclipse to the other
what is the power lost by a transmission line (made of Al) carrying 10 kA of current? By what percentage would the power loss change if the transmission line was switched to Cu
The first and second electron shells of an element are filled and there are five electrons in the third electron shell
A thin, uniform, metal bar, 3m long and weighing80N , is hanging vertically from the ceiling by a frictionless pivot, Find the angular speed of the bar just after the collision
discuss and compare the principles of the carnot cycle and the brayton cycle as two different thermodynamic cycles.
The weights of the worker and crate are 912 and 1590 N, respectively. What is the tension in the cable above the worker
Early black-and-white television sets used an electron beam to draw a picture on the screen. What is the speed of electrons in the beam
A 1300kg sports car accelerates from 0m/s to 33m/s in 12s . What is the average power of the engine?
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