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A solid block of copper (p = 8920 kg/m^3) with a volume of 0.2 m^3 is submerged in water.
(a) What is the buoyancy force on the block?
(b) Then, the copper block is formed into a boat so that it now floats. What is the minimum volume of the boat that will allow it to float?
A 70 kg man steps out a window and falls (from rest) 1.2 m to a sidewalk. What is his speed just before his feet strike the pavement
A solid cylinder (radius = 0.150 m, height = 0.120 m) has a mass of 6.90 kg. How much of the height of the cylinder is in the oil
An airoplane takeoff speed is 320km/h. if its average acceleration is 2.9m/s^2, how long is it on runway after starting its takeoff roll.
Give four examples (two of each type) of optical devices which are best understood using either Geometric Optics or Physical Optics. Justify your examples.
A duck flying horizontally due north at 14.2 m/s passes over Atlanta, where the magnetic field of the Earth is 5.09×10-5 T in a direction 55.9° below a horizontal line running north and south. The duck has a positive charge of 3.28×10-8 C. What is th..
A satellite circles a spherical planet of unknown mass in a circular orbit of radius 1.9 x 10^7 m. What would be the magnitude of the gravitational force exerted on the satellite by the planet if the radius of the orbit were increased to 3.6 x 10^7..
Two stars in a binary system orbit around their center of mass. The centers of the two stars are 7.90 1011 m apart. What is the mass of the smaller star
Aluminum is a very light metal with density of 2.7 g/cm^3. What is the weight in pounds of a solid sphere of aluminum of radius 50 cm
When the power is turned off on a turntable spinning at 78 rpm, you find that it takes 10.5 revolutions for it to stop while slowing at a constant rate. What is the angular acceleration of the turntable
Two point charges 2.0cm apart have an electric potential energy -310uJ. The total charge is 15nC. What is the lesser charge
A speeder is pulling directly away and increasing his distance from a police car that is moving at 21 m/s with respect to the ground. compute the speeder's speed with respect to the ground
A floodlight with a mass of 20.0 kg is used to clarify the parking lot. The floodlight is supported at the end of a horizontal beam that is hinged to a vertical pole.
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