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A rifle with a barrel length of 59 cm fires a 8 g bullet with a horizontal speed of 350 m/s. The bullet strikes a block of wood and penetrates to a depth of 15 cm. What resistive force (assumed to be constant) does the wood exert on the bullet?
A 0.500-kg mass on a spring has velocity as a function of timegiven by vx(t) = (3.60cm/s) sin[(4.71s-1)t -?/2]. What is the force constant of the spring
Two particles, with charges of q1 = 60.0nC and q2 = 60.0nC, are placed at the points with coordinates (0, 12.00 cm) and (0, 12.00 cm). A particle with charge q3 = 30.0 nC is located at the origin.(a) Find the electric potential energy of the confi..
Three blocks of mass m1=1.0 kg, m2=2.0 kg, and unknown mass m3 are on a frictionless forizontal surface, What is the unknown mass m3
A highway curve of radius 500 m is designed for traffic moving at a speed of 73 km/hr. What is the correct banking angle of the road.
Initially stationary (the train starts at rest), a train has a constant acceleration of 0.6 m/s2, What is its speed after 21 s
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. (a) How many electrons are there in 4.79 liters of water? (1 liter is equivalent to 1.00 × 10-3 m3) (b) What is the net charge of all these electrons?
A 258-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.980, and the log has ..
An unstrained horizontal spring has a length of 0.34 m and a spring constant of 240 N/m. Two small charged objects are attached to this spring, one at each end. The charges on the objects have equal magnitudes. Because of these charges, the spring..
Magnetoencephalography (MEG) is a technique for measuring changes in the magnetic field of the brain caused by external stimuli such as touching the body or viewing images of food. what is the magnetic field at the center of the hemisphere of the ..
An important news announcement is trans- mitted by radio waves to people who are 122 km away, sitting next to their radios, and by sound waves to people sitting across the newsroom, 1.2 m from the newscaster. Take the speed of sound in air to be 345 ..
The wire is cut at point P. Will the potential difference between points A and B increase, decrease, or remain the same? Give reason for.
A spring with spring constant 15N/m hangs from the ceiling. A ball is attached to the spring and allowed to come to rest. What is its the mass of the ball
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