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A block of wood floats in fresh water with 0.596 of its volume V submerged and in oil with 0.855 V submerged. Find the density of (a) the wood and (b) the oil.
A special electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop at an amusement park. What is the speed of the rider at the top of the loop
Suppose you are climbing up stairs, gaining 10 meters of height per minute. In order to do that, your body has to do some work, using energy, at a given rate. What is the power produced by your body? Ignore energy losses.
The "Giant Swing" at a county fair consists of a vertical central shaft with a number of horizontal arms attached at its upper end, Find the time of one revolution of the swing if the cable supporting a seat makes an angle of 30.0? with the vertical
An immersion heater has a resistance of 5.0 ohms while drawing a current of 3.0 amperes. How much electrical energy is delivered to the heater duing 200 seconds of operaion
A rope hangs from a cylinder over which it is wound, of radius 0.20 m and mass 40.0 kg, What torque does the hanging mass exert on the cylinder
A 50g ball travelling at 25m/s is bounced off a brick wall and rebounds at 22m/s. A high speed camera records this event. If the ball is in contact with the wall for 3.5ms, what is the average acceleration of the ball throughout this time interval..
Assume the near point of the eye is 25cm. Thedistance between the eyepiece and objective lens in a certaincompound microscope is l =11.3 cm. What is the overall magnificationof the microscope
you are leaking one liter of methyl alcohol methanol every 3 hours. at the start of the day you have a concentration of
Find out the magnetic field strength
vector a has magnitude of 5.0 at an angle of 60.0 o from the x-axis. vector b has magnitude of 9.0 at an angle of -20.0
A heat pump with a cop of 1.8 supplies energy to a house at a rate of 75000 kJ/h. Determine the electric power drawn by the heat pump and the rate of heat removal from the outside air
The electromagnetic wave that delivers a cellular phone call to acar has a magnetic field with an rms value of 1.50 10-10 T. The wave passes perpendicularlythrough an open window, the area of which is 0.20 m2.How much energy does this wave carry thro..
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