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A 5.00 kg object is released from rest while fully submerged in a liquid. The liquid displaced by the submerged object has a mass of 2.14 kg. Take the upward direction to be positive. What is the displacement of the object in 0.257 s, assuming that it moves freely and that the drag force on it from the liquid is negligible?
What if the acceleration is not constant? A particle starts from the origin with velocity 6i m/s at t = 0 and moves in the xy plane with a varying acceleration given by a = (2?tj) m/s2, find the position of the particle as a function of time
A pulley system lifts a 500 lb bloch 2 feet with an effort of 50 lbs. If the 50 lbs moves 30 feet, what is the efficiency of the pully system
I have a cube of charge 1 cm on a side. The total charge is 1 coulomb. Using gauss's law, calculate the electric field due to the charge a kilometer away
When chasing a hare along a flat stretch of ground, agreyhound leaps into the air at a speed of 10.9 m/s, at an angle of 25° above the horizontal. What is the range of his leap
We can approximate an electron moving in a nanowire as a one-dimensional in?nite square-well potential. What are the three lowest energy levels of the electrons
A frictionless plane is 11.5m long and inclined at 32.7 degrees. A sled starts at the bottom with an initial speed of 6.05 m/s up the incline. Find the initial speed of the second sled
A rectangular container measuring 10cmx20cmx25cm is filled with gas. What is the mass volume of water in kilograms.
A 36.0 g bullet moving at 478 m/s strikes a 3.7 kg bag of flour that is on ice, at rest. The bullet passes during the bag, leaving at 255 m/s. How fast is the bag moving when the bullet exits.
the binding energy for chromium metal is 4.37 ev. what wavelength of radiation must be used to eject electrons with a
Metal disks are initially spinning on cushions of air, in a standard rotational dynamics apparatus. What is the final angular velocity of the two disks
You are holding a bulletin board weighing 8.68 N in place against a wall while your friend secures it to the wall. How large must this force be if the coefficient of static friction with the wall is 0.42
Tests of lung capacity show that adults are able to exhale 1.5 liters of air through their mouths in as little as 1.0 second. If a person blows air at this rate through a drinking straw with a diameter of 0.60 cm, what is the speed of air in the stra..
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