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The weight of a block of metal is measured with a scale first in air, then in water. Find the specific gravity of the metal ( the ratio of the density of metal to the density of water). The tension of the block is measured 6.0N in air and 4.0N in water.
A battery has an emf and an internal resistance r. When the battery is connected to a 20 ohm resistor, the current through the battery is 0.60A
You are examining a flea with a converging lens that has a focal length of 4.40 cm. If the image of the flea is 8.00 times the size of the flea, how far is the flea from the lens
A solar cell generates a potential difference of 0.320 V when a 445.0 ? resistor is connected across it and a potential difference of 0.504 V when a 945.0 ? resistor is substituted. What is the emf of the cell
The vibrational spectrum of the H2 molecule has lines separated in frequency by 1.3x1014 Hz. determine the maximum length of the bond
An object glides on a horizontal tabletop with a coefficient of kinetic friction of 0.3. If it comes to rest after 1.3 seconds, what was its initial velocity
the fact that it moves very slowly by sky would probably cause it to be named after Yurtle, the god of turtles.
A 1940-kg car experiences a combined force of air resistance and friction that has the same magnitude whether the car goes up or down a hill at 32.2 m/s. At what angle is the hill inclined above the horizontal
A load of weight W is suspended from a cable of length L on a construction vehicle. What is the max angle through which the load swings
A total of 2.83·106 electrons are placed on an initially uncharged wire of length 1.07 m. What is the magnitude of the acceleration of a proton
A ball is thrown horizontally from a 12 m high building with a speed of 8.0 m/s. How far from the base of the building does the ball hit the ground
The gravitational acceleration on the Moon is a sixth of that on Earth. The weight of an apple is 1.03 N on Earth. What is the mass of the apple
if a 1.1x1011 n force is applied on each 100.0 m cylinder of aluminum brass and steel with a radius of 10.0 m figure 8
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