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a) When she stands 3.5m from you, what is the height of her image formed on the retina of your eye? (Consider the eye to consist of a thin lens 2.5 cm from the retina.)
b) What is the height of her image when she is 4.5 m from you?
A sound wave travels in air toward the surface of a freshwater lake and enters into the water. The frequency of the sound does npt change when the sound enters the water. The wavelength of the sound is 2.49 m in the air, and the temperature of bot..
What is the potential difference measured by voltmeter
A 3.00-g copper penny at 25.0 C drops 50.0 m to the ground. (a) If 60 percent of the initial potential energy of the coin earth system goes increasing internal energy of the coin determine the coin's final temperature (b) does the result depends on m..
What is the least coefficient of friction between tires and road that will allow cars to negotiate the turn without sliding off the road?
An eagle is flying horizontally at 5.7 m/s with a fish in its claws. It accidentally drops the fish. (a) How much time passes before the fish's speed doubles? (b) How much additional time would be required for the speed to double again?
Two balls, of masses = 60 and = 70, are suspended. The lighter ball is pulled away to a 67 angle with the vertical and released. Suppose that the positive axis is directed to the right.
Avoiding air resistance, what is the magnitude of the total velocity of the package at the moment it is thrown as seen by an observer on the ground? Answer in units of m/s.
An osprey's call is a distinct whistle at 2200 Hz. An osprey calls whereas diving at you, to drive you away from her nest. You hear call at 2220 Hz. How fast is the osprey approaching.
A 320 piano slides 3.3 down a 24 incline and is kept from accelerating by the man who is pushing back on it parallel to the incline. Determine the work done by the man on the piano.
Boxes A and B have masses of 12 kg and 4 kg, in that order. The two boxes are released from rest. Use conservation of energy to find out the boxes speed when box B has fallen a distance of 00.5 m.
A 12.00 box resting on a horizontal, frictionless surface is attached to a 5 weight by a thin, light wire that passes without slippage over a frictionless pulley. The pulley has the shape of a uniform solid disk of mass 2.5 and diameter 0.560.
A street lamp weighs 146 N. It is supported equally by two wires that form an angle of 120° with each other.
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