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A bullet of mass 7.00g is fired horizontally into a wooden block of mass 1.21kg resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.190. The bullet remains embedded in the block, which is observed to slide a distance 0.220m along the surface before stopping.
What was the initial speed of the bullet?
Earth has a net charge that produces an electric field of approximately 150 N/C downward at its surface. (a) What is the magnitude and sign of the excess charge.
what is the ball's speed immediately after the collision?
Evaluate to what temperature must both be raised so that the brass ring will slide onto the rod? If one can cools the assembled system back to 20 celcius, what is teh stress in the brass ring?
What is the bubble's diameter just as it reaches the surface of the lake, where the water temperature is 20 ^circC? Suppose that the air bubble is always in thermal equilibrium with the surrounding water.
A 13kg box slides 4 m down the frictionless ramp , then collides with a spring whose spring constant is 180Nm.
What is the maximum speed the car. A roller-coaster car speeds down a hill past point A where R1 = 8.0 m and then rolls up a hill past point B where R2 = 15.0 m.
How much work is done if the same tension is directed parallel to the snow.
Establish the temperature at the interface
A hot-air balloon is rising upward with a constant speed of 3.88 m/s. When the balloon is 7.87 m above the ground, How much time elapses before the compass hits the ground
A 64 Ω resistor is connected in parallel with a 115 Ω resistor. This parallel group is connected in series with a 20 Ω resistor. The total combination is connected across a 15V battery.(a) Find the current in the 115 Ω resistor.(b) Find the power ..
A spring of k=12.00 N/m has a block of mass 11- kg attached to it on a frictionless table. If the block is pulled a distance 0.17m to the right and released from rest, how long would it take the block to return to its equilibrium position? Give yo..
An 10m, 210N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50° angle with the ground. How far up the ladder can an 850N person climb before ladder b..
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