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1. John's mass is 93.4 kg, and Barbara's is 53.9 kg. He is standing on the x axis at xJ = +9.27 m, while she is standing on the x axis at xB = +4.16 m. They switch positions. How far and in which direction does their center of mass move as a result of the switch?
2. One object is at rest, and another is moving. The two collide in a one-dimensional, completely inelastic collision. In other words, they stick together after the collision and move off with a common velocity. Momentum is conserved. The speed of the object that is moving initially is 28 m/s. The masses of the two objects are 3.5 and 8.6 kg. Determine the final speed of the two-object system after the collision for the case (a) when the large-mass object is the one moving initially and the case (b) when the small-mass object is the one moving initially.
At a certain instant in time, in an electromagnetic wave, the electric field vector points to the north and the magnetic field vector points vertically downward.
You are examining a flea with a converging lens that has a focal length of 3.70cm. If the image of the flea is 6.00 times the size of the flea, how far is the flea from the lens
The hammer throw is a track-and-field event in which a 7.30-kg ball (the hammer) is whirled around in a circle several times and released. It then moves upward on the familiar curved path of projectile motion and eventually returns to the ground s..
wave crest pass the bow of anchored boat every 3 seconds. The distance between two crest is 6.6 m. what type of wave is it (longitudinal or transverse) and how fast is it traveling
a 14.0 gauge silver wire of diameter 1.628 carries a current of 13.0 . what is the potential difference across a 2.05
A 5.7x10^2 kg hot-air balloon takes off from rest at the surface of the earth. The wind and lift forces take the balloon up, doing +9.7 x 10^4 J of work on the balloon in the procedure. At what height above the surface of the earth does the balloo..
a 2.97-kg projectile is fired with an initial speed of 133 ms at an angle of 28deg with the horizontal. at the top of
an important radionuclide produced in water-cooled nuclear reactors is 16n which has a half-life of 7.13 s and emits
Your starship, the Aimless Wanderer, lands on the mysterious planet Mongo. how many hours will it take the ship to complete one orbit
Steam enters a turbine at 1240 ?C and is exhausted at 82 ?C. What is the maximum eficiency of this turbine
An infinitely long cylinder of radius R and linear charge densityλ has a potential on its surface of V0 volts. Usethe expression for the electric field of a uniformly charged cylinder to find the potential relative to the surface at a pointthat is di..
A car delivers 30 hp to its wheels when moving at a constant speed of 22 m/s. Calculate the total resistance force (drag & friction) on the car
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