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A hot-air balloon is ascending at the rate of 14 m/s and is 57 m above the ground when a package is dropped over the side.
(a) How long does the package take to reach the ground?
(b) With what speed does it hit the ground?
write down Newton's Second Law for the velocity of the cube.
At a construction site, a 23.0 bucket of concrete is connected over a very light frictionless pulley to a 310 box on the roof of a building. (See the figure.) There is no appreciable friction on the box, since it is on roller bearings. The box starts..
300g of water at 30 c if each gram gains 3.7 calories of heat, what i the final temperature, how much heat gained by the system
Determine how the number of real roots of the equation g(x) = 4x3 - 17x2 + 10x + k = 0, depends upon k. Are there any cases for which the equation has exactly two distinct real roots?
The greatest ocean depths on earth are found in the Marianas Trench near the Philippines, Find the pressure due to the ocean at a depth of 10.7 kilometer, assuming sea water density is constant all the way down
A 23.5 kg gold bar at25.5°C is placed in a large,insulated 0.800 kg glass container at 15.0°C with 2.00 kg ofwater at 25.0°C. Calculate the final equilibrium temperature
A 15-kg block rests on a level frictionless surface and is attached by a light string to a 5.0-kg hanging mass where the string passes over a massless frictionless pulley
A steel wire of mass 0.400kg and length 0.640m supports a 102 kg block. The wire is struck exactly at its midpoint causing a small displacement. How long does it take the peak of this displacement to reach the top of the wire.
A hot-air balloon is rising straight up with a speed of 2.78 m/s. A ballast bag is released from rest relative to the balloon when it is 2.15 m above the ground. How much time elapses before the ballast bag hits the ground?
A charged particle (Q = 10 C, m = 0.01 kg) moves at a speed of 670 m/s perpendicular to the direction of a uniform magnetic field of 0.06 T. What is the radius of the circular orbit of the particle
at a hydroelectric power plant the water pressure head is at a height of 300 m and the water flow available is 100 m3
A fighter airplane is launched from an aircraft carrier with the aid of its own engines and a steam powered catapult. Determine the work done on the airplane by the catapult
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