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A 55-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.30. A 140-N force is applied to the box. What is the frictional force on the box? How would I do the steps for this problem?
A pitcher throws a curveball that reaches the catcher in 0.55s. The ball curves because it is spinning at an average angular velocity of 280rev/min (assumed constant) on its way to catcher's mitt.
Popitronium is a hydrogen atom with the proton replaced by a positron (like electron, but w/ positive charge). Calculate E1 for popitronium.
The fundamental and first overtone for 14N16O are centred at 1876.06 cm 1 and 3724.20 cm 1 respectively. Evaluate the equilibrium vibration frequency
Wonder Woman and Superman fly to an altitude of 1650 km, carrying betwen them a chest full of jewels that they intend to put into orbit around Earth. At what speed does the chest impact the surface of the water
A 0.200 T magnetic field is directed along the positive x axis. A magnetic field of unknown magnitude acts along the positive y axis, Find the magnitude of the unknown magnetic field
Capacitors C1 = 5.65 µF and C2 = 2.75 µF are charged as a parallel combination across a 250 V battery. Calculate the resulting charge on each capacitor
A plane is headed due west with an air speed of 224 m/s. Find the velocity of the plane relative to the earth
A ball of mass M = 17 kg is suspended from a vertical inextensible string of length l = 1.5 m. A bullet of mass m = M/2 traveling with a horizontal velocity v = 9sqrt(g*L) collides with the ball, What is the velocity of the ball-bullet system
In a game of billiards, the cue ball is traveling eastward when it strikes a second ball that is initially at rest. After the collision, the cue ball moves at 4.79 m/s, What was the speed of the cue ball prior to the collision
A stationary pion (mass m?) decays into a muon (mass mµ) and a neutrino (mass m? ? 0, i.e. treat as massless). How fast does the muon go
Two charged, parallel, flat conducting surfaces are spacedd=2.00cm apart, What is the initial speed of the electron if it stops just at the second surface
A marble is thrown horizontally with a speed of 19 m/s from the top of a building. From what height above the ground was the marble thrown
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