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A 4-kg ball traveling to the right with a speed of 4 m/s collides witha 5-kg ball traveling to the left with a speed of 2 m/s. What is the total momentum of the two balls before they collide? After the collide?
Find out an angular momentum of the system
A rifle with a weight of 30 N fires a 3.0-g bullet with a speed of 240 m/s, Find the recoil speed of the rifle
An element in its solid phase has mass density 2100kg/m3 and number density 4.39×1028atoms/m3. What is the element's atomic mass number
at a given instatn in time, a traveling EM wave is noted to have its maximum magnetic field pointing west, what are the maximum values for the two fields
What should be the spring constant of a spring designed to bring a 1400 car to rest from a speed of 95 so that the occupants undergo a maximum acceleration of 5.
A kayaker needs to paddle north across a 200 wide harbor. The tide is going out, creating a tidal current that flows east at 2.0. The kayaker can paddle with a speed of 3.0. In which direction must he paddle in order to travel straight across the har..
A trough is 5 feet long and 1 foot high. The vertical cross-section of the trough parallel to an end is shaped like the graph of y=x10 from x=1 to x=1. The trough is full of water. Find out the amount of work in foot-pounds required to empty the t..
A certain atom of has 89 protons. Assume that the nucleus is a sphere with radius 7.25 fm, find the magnitude of the electric field produced by the protons
A certain metal with atomic mass 2.6 × 10?25 kg has an interatomic bond with length 2.5 × 10?10 m and stiffness 45 N/m. What is the speed of sound in a rod made of this metal
A single electron orbits a lithium nucleus that contains three protons (+3e). The radius of the orbit is 2.20 × 10-11 m. Determine the kinetic energy of the electron.
At what distance along the central axis of a ring of radius 1.8 cm and uniform charge 66 C is the magnitude of the electric field maximum.
Consider a dry air parcel initially at the surface (T=25 degrees celsius and p=980mb) that rises adiabatically to a final location at 900mb
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