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In a autocollimation experiment, a thin convex lens is placed 25 cm from a pinhole that acts as a point source of light. A plane mirror placed 20 cm behind the lens reflects the light back through the lens, and the reflected light forms a sharp spot beside the pinhole.
What is the focal length of the lens (in cm)?
Phil finds an old bone at an archeological site and decides to date it. The site is located geographically at a position where the ratio of 14C to 12C in the atmosphere before the year 1900 was about 1.31 · 10-12
two billiard balls of equal mass undergo a perfectly elastic head-on collision.if one balls initial speed was 1.80ms
when jumping straight down you can be seriously injured if you land stiff-legged. one way to avoid injury is to bend
one mole of an ideal gas at 1 atm and 0 c is compressed isothermally from 50l to 20l during this process energy is
A person whose eyes are 1.75m above the floor stands in front of the plane mirror. The top of her head is 0.11.
Nichrome wire of cross-sectional radius 0.758 mm is to be used in winding a heating coil. find the length of wire you must use to wind the coil
one gram of water changes from liquid to solid at a constantpressure 1.00 atm and a constant temperature of 0degrees. Find the work done on the water
The model airplane in Figure 5.6 is flying at a speed of 14.5 m/s on a horizontal circle of radius 18.1 m. The mass of the plane is 0.801 kg, What is the net work done on the plane
A bar 5.0 m long has its center of gravity 1.5 m from the heavy end. What is the weight of the bar
An outboard motor for a boat is cooled by lake water at 14.7 degC and has a compression ratio of 14.1, Calculate efficiency of the engine's Otto Cycle
Red light from three separate sources passes through a diffraction grating with 5.50×105 lines/m. Calculate the first-order diffraction lines of each ot these sources
A typical steel B-string in a guitar resonates in its fundamental frequency at 240 Hertz. The length of the string is 0.600 m. Find the wavelength of the third harmonic of the guitar string
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