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A luminous disk of diameter 2 cm is places 0.8m to the left of a flat screen. A converging lens is places among the disk and the screen at a location 20cm from the disk and a real image is formed on the screen.
1. Discover the focal length of the lens.
2. Discover the size of the image.
Drawing on Eratoshthenes' method, if two observers are due north and south of each other and are separated by 400 km, what is circumference of their spherical world if they see the similar star on their meridian at altitudes of 23degrees and 47deg..
Two parallel plates, each of area 7.00 cm^2, are seperated by 3.50 mm of water, What is the magnitude of the potential difference between the plates
A system consisting of an ideal gas at the constant pressure of 150kPa gains 810J of heat. Find the change in volume of the system if the internal energy of the gas increases by 490J
A cannon fires a cannon ball at 853.59 m/s in a straight line that passes directly over an observer's head. how far is the cannon from the observer
A thin film of acetone (n = 1.25) coats a thick glass plate (n=1.50). White light is incident normal to the film. In the reflections, fully destructive interference occurs at 500 nm and fully constructive interference at 542 nm. Calculate the thickne..
A 6.0 x 104 kilogram space probe is traveling at a speed of15000 m/s through deep space. find what is the final speed of the probe
A baseball with a mass of 0.14 kg is moving at +35 m/s. Calculate the momentum of the baseball
approsimate the terminal speed of a wooden sphere (density 0.890 g/cm3) falling through air, if its radius is 9.00 cm and its drag coefficient is 0.500. (The density of air is 1.20 kg/m3.)
In a series R-L-C circuit, L=0.200 H, C=80.0 microfarads, and the voltage amplitude of the source is 240 V. What is the resonance angular frequency of the circuit
As an eager scientist on a hot summer day you wish to determine how much ice to buy to add to your cooler which is filled with 36 cans of soda which are warm at 81.7°F. how much ice needs to be added to your cooler
A 0.57-kg air cart is attached to a spring and allowed to oscillate. Find the maximum force exerted on it by the spring
Given the Sun's distance from the center of the Milky Way and the Sun's period of revolution, how can we determine a lower bound for the mass of the Milky Way galaxy?
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