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A thermodynamic system undergoes a process in which its internal energy decreases by 455 J. Over the same time interval, 236 J of work is done on the system. Find the energy transferred from it by heat.
Jill jumps off the diving board with a velocity of 1.7 m/s at 38 degrees above horizontal. if the water surface is 2 meters below the board: with what velocity will she hit the water
An 85-g arrow is red from a bow whose string exerts a constant force of 105 N on the arrow over a distance of 75 cm. Illustrate what is the speed of the arrow as it leaves the bow?
A 215.0 g piece of lead is heated to 89.0oC and then dropped into a calorimeter containing 500.0 g of water that initally is at 21.0oC. compute the final equilibrium temperature of lead and water
Two identical speakers are driven by the same oscillator @ 200Hz. They are located on a vertical pole & 4.00 m apart. A man walks straight towards the lower speaker perpendicular to the pole.
Two negative, equally charged drops of water, 0.80 mm apart, exert an electrostatic force of 78.5 x 10-9 N on each other. Determine the net charge on each drop. Give your answer in the form "a.bc" pico-Coulombs.
A heavy sled is being pulled by two people as shown in the figure. The coefficient of static friction between the sled and the ground is ?s = 0.571, what is the sled\'s acceleration
A rope exerts a constant horizontal force of 250N to pull a 60 Kg crate across the floor.
What's the quickest way to approach this problem? A car is traveling at 80 km/h along the highway. How long does it take for the second car to pass the first
Three uniform thin rods, each of length L = 19 cm, form an inverted U. The vertical rods each have a mass of 12 g; the horizontal rod has a mass of 44 g. What are (a) the x coordinate and (b) the y coordinate of the system's center of mass.
A man standing on the ground throws a pebble with an initial veloctiy of 14m/s at an angle of 70 degrees above the horizontal, How high above the ground is the window
Three charges are at the corners of an isosceles triangle, Calculate the amount of work required to assemble this system of charges, assuming they are brought in from infinity
A 24-kg boy stands 1 m from the center of a frictionless playground merry-go-round, which has a moment of inertia of 218 kg m2. Calculate the speed of the boy relative to the surface of the merry-go-round
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