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A piece of silver weighs 89.5 N in the air, 78.5N in the water and 85.6N in an unknown liquid. Find the densities of the metal and of the unknown liquid.
A 6.00kg ball is dropped from a height of 11.0m above one end of a uniform bar that pivots at its center. The bar has mass 7.50kg, How high will the other ball go after the collision
A 200-m-wide river flows due east at a uniform speed of 4.5m/s. A boat with a speed of 9.0m/s relative to the water leaves the south bank pointed in a direction 28o west of north. How long does it take for the boat to cross the river
When one marble hit the end of the line of marbles, how many shot off the other end? Describe the momentum of the set of marbles before and after the collision
two kilograms of water execute a carnot power cycle inside a piston-cylinder device. during isothermal expansion water
A dentist uses a mirror to examine a tooth that is 0.75 cm in front of the mirror. The image of the toothis formed 10.0 cm behind the mirror. Determine the mirror's radius of curvature.
At a height of fifteen meters above the surface of a freshwater lake, a sound pulse is generated. How deep is the lake
A violent rainstorm dumps 0.9 cm of rainon a city 3 km wide and 6 km long in a 2 h period. How many metric tons (1 ton= 103 kg) of water fell on the city?
Suppose you put five electrons into a 0.30nm -wide one-dimensional rigid box (i.e., an infinite potential well). What is the ground-state energy
Describe the method used to measure the Sun's shadow and in the drawing on page 18 what are the letters b and d used for?
A cube of wood and a cube of concrete, each 0.17 m on a side, are placed side by side. What is the total rate of heat transfer through the cubes
A farmer named Ben attempts to remove an 80-kg rock from his field. He applies a force of 789 N for 10 seconds but could not move the rock. How much work has he done
A magician wishes to create the illusion of a 2.97-m-tall elephant. He plans to do this by forming a virtual image of a 38.0 cm tall model elephant with the help of a spherical mirror. How far from the mirror will the image be formed
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