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A 0.004-kg bullet is fired into a 0.200-kg block of wood at rest on a horizontal surface. After impact, the block with the embedded bullet slides 8.00 m before coming to rest. If the coefficient of friction is 0.400, what is the speed of the bullet before impact?
A transverse periodic wave is represented by the equation z(y,t) = 3.2 cm sin( 5m^-1 y + 1500 rad/s t). What is the frequency of the vibration of the wave? Give answer in Hz
A prospector finds a solid rock composed of granite (? = 2650 kg/m3) and gold. The volume of the rock is 3.40 10-4 m3 and its mass is 3.87 kg. What percentage of the rock is gold by mass
If an electron makes a transition from the n = 6 Bohr orbit to the n = 2 orbit, determine the wavelength of the photon created in the process
A express train travels along a straight line between two stations, A and D. Stations B and C are spaced evenly along the line between A and D. The engineer leaves A and accelerates at a constant rate until he passes station B
Two identical pucks are on an air table. Puck A has an initial velocity of 2.0 m/s in the +x-direction. What is the speed and direction of puck B after the collision
A lecturer is demonstrating two-slit interference with sound waves. Two speakers are used, 1.9 m apart. The sound frequency is 1180 Hz and the speed of sound is 343 m/s. Students sit facing the speakers in a row of seats 5.1 m away.
On a cold day, 28100 J of heat leaks out of a house. The inside temperature is 19.0° C, What is the increase in the entropy of the universe that this heat loss produces
If the hypotenuse of a right triangle is 6.00cm long, and the opposite is 4.00. What is the angle facing the opposite
A thin rod consists of two parts joined together. One-fourth of it is silver and three-fourths is gold. The temperature decreases by 21 C°.
The patellar tendon attaches to the tibia at the tibial tuberosity. The tibial tuberosity is 8 cm from the center of the knee joint. how large is the force in the patellar tendon
A 5C charge moves with velocity v = 10i + 3 j - 7 k m/sec in magnetic field B = 5i+ 13j - 1k tesla. find directions of magnetic force on the moving charge
A solid weighs 300N. Calculate the pressure exerted by the solid when it is kept on a glass surface, if the area of contact is 700cm2 . solve the numerical.
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