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George is going to bungee jump from a bridge that is 55.0 m over the river below. The bungee cord has an unstretched length of 27.0 m. To be safe, the bungee cord should stop George's fall when he is at least 2.00 m above the river. If George has a mass of 75.0 kg, what is the minimum spring constant of the bungee cord?
Fuel aboard a rocket has a density of 2870 kg/m^3 and is ejected with a speed of 2650 m/s. what volume of fuel must be burned per second
you are traveling on a plane. the velocity of the plane with respect to the air is 140 ms due east. the velocity of the
Write down the original position of the system
You're 6.0 m from one wall of a house. You want to toss a ball to your friend who is 6.0 m from the opposite wall. What minimum speed will allow the ball to clear the roof
Workers pushing a 180-kg trunk across a level floor encounter a 10-m long region where the floor becomes increasingly rough; the coefficient of kinetic friction enhancements.
A string that is 20.0 cm long and has a mass per unit length of 8.00 10-3 kg/m is stretched to a tension of 18.0 N. (a) Find the fundamental frequency. f1 = Hz (b) Find the next three frequencies that could cause standing-wave patterns on the string...
The diffusion constant for the alcohol ethanol in water is 1.24 10-9 m2/s. A cylinder has a cross-sectional area of 3.95 cm2 and a length of 2.02 cm. what mass of ethanol diffuses through the cylinder
A hockey puck has a mass of 0.113 kg and is at rest. A hockey player makes a shot, exerting a constant force of 28.0 N on the puck for 0.16 s. With what speed does it head toward the goal
In a series L-R-C circuit, the components have the following values: = 21.5 , = 165 , and = 400 . The generator has an rms voltage of 120 and a frequency of 1.25 .Determine the average power supplied by the generator. Determine the average power diss..
an electron of mass 9.11x10-31 kg has an initial speed of 2.40x105 ms. it travels in a straight line and its speed
the earth has not only a magnetic field which directs your compass but an atmospheric electric field. during days of
question an aircraft has a lift-off of 120kmh. a what minimum constant acceleration does the aircraft require if it is
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