You are playing a game where you drop a coin into a water tank and try to land i

Question

You are playing a game where you drop a coin into a water tank and try to land it on a target. You often find this game at fast food places as part of a fundraiser. The sides of the tank are flat and the target is 6in from the side of the tank. Your eye is Din from the side of the tank. Water has index of refraction of 4/3. If you drop the coin accurately and it falls straight down to the location where the target appears to be, how far are you off? Does the coin fall in front or behind the target as you look at it? Select One of the Following: The power output of the sun is 3.846 Times 10^26 W and the radius of the sun (approximately) is 6.96 Times 10^8 m. Calculate the total force at normal incidence on a perfectly reflecting circular mirror of area 1 m^2 placed at the sun's surface (before it vaporizes) Select One of the Following If an artificial ruby (n = 1.7) was formed into a double convex lens with radii of magnitude 54km and 715cm. what would the focal length of the lens be? Note, you will have to determine the signs of the radii.

Explanation / Answer

explanation of 15.10 ; answer : C

formula: 1/f = (u-1)(1/R1+1/R2)

1/F = (1.7-1)(1/50 + 1/75)

= 0.7(5/150)

=0.7/30

there fore F = 30/.7=300/7=43cm

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