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a hollow cube with 12 cm in each side and thickness 1 cm floats half submerged in a liquid of density kg/m^3. find the density of the cube. find the density of another liquid in which the hollow cube floats just completely.
A thundercloud similar to the one described in Example 24.3 produces a lightning bolt that strikes a radio tower. find the effective resistance of the air during the lightning strike
A 24kg chimpanzee hangs from the end of a horizontal, broken branch of length L0 = 1.4m , What is the shear modulus for this branch
Two identical spools are held at the same heights above the floor. The thread from the spool A is tied to an overhead support while spool B is not connected to the support. which spool will hit the floor first
An inflated basketball has a gauge pressure of 9.0lb/in2. What is the actual pressure inside the ball
The force on a wire carrying 8.70A is a maximum of 1.25N when placed between the pole faces of a magnet. what is the approximate strength of the magnetic field
A research submarine has a 10-cm-diameter window that is 8.7cm thick. What is the submarine's maximum safe depth in salt water
It takes 1.4×106J of heat to bring a quantity of water from 14 ? C to a boil. What is the mass of the Water
What is the wavelength of the waves emitted by source? What is the difference in frequency between the directly radiated waves and the waves reflected from a whale traveling straight toward the ship at 4.95 ? Assume that the ship is at rest in the..
A bird sits on a high-voltage power line with its feet 4.6 cm apart. What is the potential difference between the bird's feet
suposse that a ferrari and a porsche begin a race with a moving start and each moves with constant speed. one lap of
A step-down transformer is used for recharging the batteries of portable devices. The turns ratio N2/N1 for a particular transformer used in a CD player is 9:42. find the rms output voltage of the transformer
A 0.9 inch tall clock is 29 cm in front of a diverging lens which has a focal length of -30 cm, Determine the image distance and height
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