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The density of ice is 917 kg/m3, and the density of sea water is 1025 kg/m3. A swimming polar bear climbs onto a piece of floating ice that has a volume of 6.25 m3. What is the weight of the heaviest bear that the ice can support without sinking completely beneath the water?
A fisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. What is the amplitude A of each wave
A current-carrying wire of length 0.5m is at the Equator. Assuming that the magnetic field of the Earth has magnitude of 5 x 10^-5 T, what current is required to allow the wire to be suspended
A science student is riding on a flatcar of a train traveling along a straight horizontal track at a constant speed of 12.9 m/s. How high does the ball rise
An outside loudspeaker (considered a small source) emits sound waves with a power output of 120 W. Find the intensity level in decibels at that distance
In the two-slit experiment, the distance between the slits and the screen is 1.10 m and the distance between the slits is 0.100 mm. what is the wavelength of light
Suppose 1.00kg of water at 100 degrees Celsius is mixed with 1.00kg of water at 0 degrees Celsius. What is the total charge in entropy of the mixture
A 1500kg car skids to a halt on a wet road where coefficient of friction = 0.46. How fast was car traveling if it leaves 68m long skid marks.
a projectile is shot from the edge of a cliff 115m above the ground level with a inital speed of 65.0m/s at an angle of 35 degrees
A battery with an emf of 12.0 V shows a terminal voltage of 11.8 V when operating a circuit with four light bulbs each rated at 4 W (at 12.0 V) which are connected in parallel. What is the current in each bulb
imagine that each person is about the same distance from the center of the field and can generate the same level of sound intensity. How many people are at game.
Calculate the minimum required initial velocity for a home run, for baseballs hit at the angles 10 degree, 20 degree, 30 degrees, and 40 degrees from the horizontal
A 3m-long rigid beam with a mass 140 kg is supported at each end. An 75 student stands 2m from support 1.
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