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A rope having a total mass of 0.4 kilogram and total length 4 meter has 0.6 meter of the rope hanging vertically down off a work bench. Determine how much work must be done to place all the rope on the bench?
an object is placed at a distance of 28 cm from a thin convex lens. the lens has a focal length of 9 cm. what are the
answer the following questionsa in any ac circuit is the applied instantaneous voltage equal to the algebraic sum of
An oil slick on water is 120nm thick and illuminated by white light incident perpendicular to its surface. What color does the oil appear (what is the most constructively reflected wavelenth), given its index of refraction is 1.40?
a pendulum consists of a mass hanging from a string of length 1.0 mattached to the ceiling. suppose that this pendulum
One cubic meter of water flowing over Niagara Falls in New York drops 83.7 meters. how much heat energy would the water have
Two conductors having net charges of +15.0 µC and -15.0 µC have a potential difference of 15.0 V between them, obtain the capacitance of the system
a rigid structure consisting of a circular hoop of radius R and mass m, and a square made of four thin bars, each of length R and mass m. What is its angular momentum about that axis
A 32-g ice cube at its melting point of 273 K is dropped into a huge, insulated container of liquid nitrogen. Suppose the nitrogen is at its boiling point of 77K and has a latent heat of vaporization of 200KJ/Kg. What is the entropy change of (a) liq..
A 60 kg woman in an elevator is accelerating upward at 1.2 m/s^2. what is the normal force pushing upward on her feet
Ashley (65 kg) and Ryan (80 kg) ride their motorcycles (100 kg) at a speed of 15 m/s in a spherical metal cage with a diameter of 10m, What is the normal force on Ryan
A heat engine is taking in 400 J from a hot reservoir that is at 20 degrees Celsius. It expels heat to a cold reservoir at 0 degrees Celsius> What is the ideal efficiency of the engine
The Mars rover was deployed on the surface of Mars in July 1997. At one point during its subsequent mission, radio signals took about 9 min to travel from Earth to the rover. How far was Mars from the from Earth at that time? ___________m
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