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A 4.4-g bullet leaves the muzzle of a rifle with a speed of 314 m/s. What force (assumed constant) is exerted on the bullet while it is traveling down the 0.86-m-long barrel of the rifle?
N
T thin lense with a focal length of 50 cm is placed 100 cm from an object. How far behind the lense should we place a screen
A parallel-plate capacitor is charged and then disconnected from the battery that charged it. A teflon layer is inserted between the plates
Treat a Boron atom as 5 protons at the origin, 2 electrons spread uniformly on a shell (radius 13.2[pm] centered on the origin) , 2 more electrons spread on a shell (radius 105.8[pm] centered on the origin), and its outer electron at x= 211.6 pm.
Each second, 5525 m3 of water flows over the 670-m-wide cliff of the Horseshoe Falls portion of Niagara Falls. How far from the base of the cliff is the barrel
The biological activity of some organs can be investigated using radioactive isotopes. For example, iodine is important in the action of the thyroid. if the physical half life of is 194 hr, what is the biological half life of iodine in the bulk of ..
A student pulls a box of books on a smooth horizontal floor with a force of 100 N in a direction of 37 degrees above the horizontal. If the mass of the box and the books is 40 kg, what is the normal force on box? a. 332 N b. 312 N c. 392 N d. 292 N
q1. a man lifts a 22.4 kg bucket from a well and does 6.7 kj of work. the acceleration of gravity is 9.8 ms2.how deep
carnival ride has a large horizontal steel disc of radius 5m from which cars are suspended by a 6m long chain. the disx is rotated about its axis so that the cars swing out and revolve in a circular path. at operation speed the angle of the chains ..
A 690 g wood block is at rest on a frictionless table, when a 27 g bullet is fired into it. what was the original speed of the bullet
neon sign requires 12,000 V to operate which is supplied by a transformer. If the primary on the transformer has 10 turns and is connected to a 120-V outlet, how many turns does the secondary have
The critical angle for a certain liquid-air surface is 43.8 degrees, what is the index of refraction of the liquid
An alpha particle ( a doubly ionized helium atom with a mass of 6.64 x 10^-27 kg) is traveling with a velocity v=1x10^6 m/s j, What direction is the magnetic field above
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