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Two small 5.17-kg masses are joined by a string, which can be assumed to be massless. The string has a tangle in it, as shown in the figure. With the string tangled, the masses are separated by 1.97 m. The two masses are then made to rotate about their center of mass on a frictionless table at a rate of 4.09 rad/s. As they are rotating, the string untangles and lengthens to 2.47 m. What is the angular velocity of the masses after the string untangles?
A skydiver opens the parachute at the moment when he is 540 meters above the ground and his speed (right before opening the parachute) is 97m/s. What should be the magnitude of the air resistance force
How to find out the magnitude of the acceleration
A diving board length = 5.40 that weighs 230 is supported by two pillars. One pillar is at the left end of diving board; the other is distance = 1.60 away. Determine the magnitude of the force exerted by the left pillar while a 90.0 diver stands a..
A 532 nm light wave in vacuum transmits into a glass plate of thickness 1.00 cm and index 1.60, at normal incidence. How many wavelengths span the glass
An aircraft weighing 902 N is accelerated at 10.8 m/s/s for 5 seconds, at which time the aircraft launches. What is the force required to launch the aircraft
A uniform disk of radius 0.471 m and unknown mass is constrained to rotate about a perpendicular axis through its center. Find the mass of the disk
Two boats are initially separated by distance d and head directly toward one another. The skippers of the boats want to arrive at the same time at the point that is halfway between their starting points.
a steel wire 2.04 m long with a circular cross section must stretch no more than .260 cm when a 400.3 N weight is hung from one of its ends, what is the minimum diameter must this wire have
An alpha particle (q = 2e and m = 6.64e-27 kg) is accelerated from rest through a potential difference of 1.2e+5 volts. Find the speed of the particle after being accelerated
A carbon resistor is made of a cylinder of carbon, of diameter 7.4 mm. what is the length of the cylinder
You need to design a photodetector that can respond to the entire range of visible light. What is the maximum possible work function of the cathode
A small solid sphere, with radius 0.25 cm and mass 0.56 g rolls without slipping on the inside of a large fixed hemisphere with radius 15 cm, What is its kinetic energy at the bottom
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