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A bullet is fired through a board 9.0 cm thick in such a way that the bullet's line of motion is perpendicular to the face of the board. The initial speed of the bullet is 400 m/s and it emerges from the other side of the board with a speed of 300 m/s.
(a) Find the acceleration of the bullet as it passes through the board.
(b) Find the total time the bullet is in contact with the board.
Two 34.8-cm metal rods, one made of copper and one made of aluminum, are placed end to end, touching each other. How far does the other end of the system of rods move
Use the ideal gas approach to find the thermal velocity, and determine the scaling law based on the resulting equation
A telephoto lens with focal length of 120mm has f-numbers ranging from f/2.8 to f/22, What is the diameter of the lens aperture at f/2.8? in millimeters
A rectangular plate has a length of (20.4 0.2) cm and a width of (8.7 0.1) cm. Calculate the area of the plate
What is the (a) magnitude and (b) angle (measured relative to the positive direction of the x axis) of the asteroid's acceleration.
a projectile is launched from a 50 m high cliff, with an initial velocity of 65.0 m/s, at an angle 67.4 degrees above horizontal. how far away from the cliff does it land
The atmosphere on Mars is almost all carbon dioxide (CO2), and has a pressure of about 6.9×102 Pa, what is the mass of one cubic meter of the atmosphere
a 250-kg motorcycle goes around an unbanked turn of radius 13.7m at a steady 96.5 km/h. What is the magnitude of the net force on the motorcycle?
Light intensity of a 100 W bulb at a certain distance is 1 W/m2. The distance is doubled. What are the electric field amplitude and the magnetic field amplitude at that new distance
An isolated conductor of arbitrary shape has a net charge of +1.2 10-5 C. What is the charge on the cavity wall
A 200-pound boy lifts a 40-kg box off of the floor 1.3 meters in 0.7 seconds. determine Which boy is more powerful
The aire outside a hot-air balloon has a temperature of 17 C. Assume the pressure of the gas inside the balloon is roughly the same with the pressure outside of the balloon. What is the temperature of the air inside the balloon
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