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In many locations, such as Lake Washington in Seattle, floating bridges are preferable to conventional bridges. Such a bridge can be constructed out of concrete pontoons, which are essentially concrete boxes filled with air, Styrofoam, or another extremely low-density material. Suppose a floating bridge pontoon is constructed out of concrete and Styrofoam, which have densities of 2200 kg/m3 and 50.0 kg/m3. What must the volume ratio of concrete to Styrofoam be if the pontoon is to float with 45.9% of its overall volume above water?
a ray of light is incident on the mid-point of a glass prismsurface at an angle of 25 degrees with the normal. for
The length of a simple pendulum is 0.70 m and the mass of the particle (the "bob") at the end of the cable is 0.24 kg. Using the position of the bob at its lowest point as the reference level, determine the total mechanical energy of the pendulum as..
Two hockey players strike a puck of mass 0.169 kg with their sticks simultaneously, exerting forces of 1.17 103 N, compute the instantaneous acceleration of the puck
At age 40, a man requires contact lenses (f=65.0 cm) to read abook held 25.0 cm from his eyes. By what distance has his near point changed
A 100-tesla magnetic field exerts a force of 20N on a 1-meter length of wire with a cross-sectional area of 0.001m^2. Calculate the current induced in the wire
while exploring a cave a spelunker starts at the entrance and moves the following distances. she goes 75.0 m north 250
What is the difference between mass and weight? On earth, what is the weight of a 1 kg mass?
Consider a generator with a 350 turn coil on its armature and a uniform magnetic field of 5.4 T. how fast do we need to rotate the coil
If 5.0 ´ 1021 electrons pass through a 20-W resistor in 10 min, what is the potential difference across the resistor
A point charge q is imbedded at the center of a sphere oflinear dielectric material (with susceptibility and radiusR). What is the totalbound charge on the surface
A "swing" ride at a carnival consists of chairs that are swung in a circle by 19.3 m cables attached to a vertical rotating pole, Find the speed of the chair
using a modified version of Kepler's third law. Using a mass formula M1 = a^3/P^2 use this mass to determine the mass of Jupiter using data from its moon Callisto, calculate the mass of Jupiter
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