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A kid at the junior high cafeteria wants to propel an empty milk carton along a lunch table by hitting it with a 3.0 g spit ball. If he wants the speed of the 40 g carton just after the spit ball hits it to be 0.31 m/s , at what speed should his 3.0 g spit ball hit the carton?
A pair of flat mirrors meet to form a right angle. A beam of light is incident on one of them at a point 11.5 cm from their point of intersection, find what is the angle of incidence at the first mirror
A diverging/negative lens has a focal length of -12 cm. A 6.0 cm object is placed at several locations relative to the lens. The locations are (a) 55 cm, (b) 12 cm, and (c) 8 cm from the lens. Use the thin lens equation to calculate the image distanc..
Batman (mass = 101 kg) jumps straight down from a bridge into a boat (mass = 590 kg) in which a criminal is fleeing. What is the velocity of the boat after Batman lands in it
A column of soldiers, marching at 133paces per minute, keep in step with the beat of a drummer at thehead of the column. What is the approximate length of the column
Two children in a tree house 6.5 m above the ground are playing with snowballs. One throws snowball A horizontally at 14 m/s. Find the velocity of each snowball the moment they strike
two astronauts are 1.5 m apart in their spaceship. one speaks to the other. the conversation is transmitted to earth
a converging lens forms an image of an 8.00-rnm-tall real object. the image is 12.0cm to the left of the lens 3.40cm
Objects with masses of 170 kilogram and a 470 kilogram are separated by 0.420 meter. Find at what position can the 54.0 kg object be located so as to experience a net force of zero
The human visual resolution is 1 minute of arc. Assuming that you are looking down an isolated road at night. at what distance can you distinguish the two headlights of an approaching car?
A small plastic ball of mass 9.44 × 10-3 kg and charge +0.181C is suspended from an insulating thread and hangs between the plates of a capacitor, What is the magnitude of the charge on each plate
The best leaper in the animal kingdom is the puma, which can jump to a height of 3.7 m when leaving the ground at an angle of 45°. With what speed must the animal leave the ground
In 1980, over San Francisco Bay, a large yo-yo was released from a crane. What was the tension in the cord on which it rolled
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