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2. A cannon fires a cannonball from the top of a wall at a speed of 23.07 m/s and an angle of 19.56 degrees from the horizontal. A cannonball that was accidentally dropped from the top of the castle hits the water below in 2.11 s. What is the horizontal distance from the wall where the fired cannonball hits the ground?
Consider a solid metal conductor in static equilbrium. What is the electric field inside the conductor
A light bulb is connected to a 240-V wall socket. The current in the bulb depends on the time t according to the relation I = (2.828 A) sin[(596.6 Hz)t].Determine the resistance of the bulb's filament
In fair weather, over flat ground, there may be a downward electric field of 155 N/C. Calculate the charge density of the air
What is the minimum coefficient of friction that will prevent sliding. What should be the highest speed of the car so it can round the curve safely.
A window air conditioner uses 1392 W of electricity and has a coefficient of performance of 2.47. How much work will be done by the air conditioner during the process of cooling the room
How high is the top of the ski lift relative to the base.
A curve in a highway has radius of curvature 120 m and is banked at 2.8°. what is the safest speed to go around the curve
If a technician strikes this blade with a mallet 1.15m from the center with a 40.0N force perpendicular to the blade, find the maximum angular acceleration the blade could achieve
A rectangular block of ice 9.00m on each side and 1.6 m thick floats in sea water. The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3.
Suppose a formula for gain in heat energy of an object is H = m(A - B), where m = mass and (A - B) is its rise in temperature between A degrees and B degrees (as in #4). Write an expression for the absolute uncertainty, delta-H, in terms of m, del..
What horizontal force P must a worker exert on the rope to position 50 kg. crate directed over the trailer.
ball rolls onto the path of your car as you drive down a quiet neighborhood street. To avoid hitting the child that runs to retrieve the ball, How far did the car move while breaking
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