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1) a block of wood has specific gravity 0.79. When placed in water, what percent of the volume of the wood is under the surface. And what volume of the wood is above the surface?
2) Legend says that Archimedes, in determining whether or not the king%u2019s crown was made of pure gold, measured its volume by the water displacement method. If the density of gold is 19.3 g/cm^3, what volume would be necessary to prove that it is pure gold?
A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. He notes that it takes the wave 0.795 s to reach the opposite tower, 20.0 m away. If a 1 meter length of ..
A beam of neutrons that all have the same energy scatters from the atoms that have a spacing of 9.30×10^?2nm in the surface plane of a crystal
Consider the system of capacitors shown in the figure below (C1= 2.00 uF, C2= 3.00 uF). Find the total energy stored by the group
Felipe over the summer goes to six flags, he gets on a ride that starts at a height of 29m traveling at a speed of 5 m/s, what is the normal force from the seat when he is at the top of the loop
In a certain automobile engine with an efficiency of 19.2%, combustion of gasoline in one cylinder releases 490 J of heat. Find the total mechanical power produced by all four cylinders, operating at 48 cycles/s, or 2880 rpm
A wave on a string is described by the equation y = (4.2 mm)cos(3000t 0.45x) where t is measured in s and x is measured in mm
An arrow is shot from a height of 1.9 m toward a cliff of height H, what is the height of the cliff in meters and what is the max height of the arrow along its trajectory in meters
a hydrogen atom is in the n=15 state. In the Bohr model, how many electron wavelengths fit around this orbit
A cube of ice is taken from the freezer at -8.4 and placed in a 104 aluminium calorimeter filled with 322 of water at room temperature of 20. The final situation is observed to be all water at 17.
How much energy is stored in a 11.2mH inductor carrying a 1.45A current? Solve for mJ
A 13 g bullet traveling 217 m/s penetrates a 2 kg block of wood and emerges cleanly at 153 m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges.
An initially motionless car of mass 1000kg slides down from a height on a frictionless roller coaster track. What was the minimum height from which it was released
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