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Can a system whose momentum is conserved be made up of smaller systems whose individual momenta are not conserved? Explain why or why not and give an example.
The external magnetic field in a loop decreases from 0.1 Tesla to zero in 2 seconds. The loop of wire has ten turns, a radius of 10 cm, with its axis 45 degrees relative to the magnetic field. How large is the induced voltage in the loop?
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
1- draw a large circle. now place the major surface pressure and wind belts of the world at their appropriate
A.) what is the average kinetic energy in joules of hydrogen atoms on the 5,500 degree celcius surface of the sun B.) What is the average KEof helium atomsin a region
A submerged scuba diver looks up toward the calm surface of a freshwater lake and notes that the Sun appears to be 32 degrees from the vertical. At what angle above the horizon does the friend see the sun
Suppose a disk of radius R and mass M starts from rest at a height of 2.5m, What is the linear speed of the disk when it leaves the incline
What is the final temperature when .032kg of milk at 11C is added to .16 kg of coffee at 91C. suppose the specific heat capactieis of the two liquids are the same as water, and disregard any energy transfer to the liquid's surroundings.
A runner covers one lap of a circular track 40.0m in diameter in 63.3s. what were her average velocity(in m/s) for that half-lap
A student sits on a freely rotating stool holding two weights, each of mass 2.90 kg. When his arms are extended horizontally, Find the new angular speed of the student
A string trimmer is a tool for cutting grass and weeds; it utilizes a length of nylon "string" that rotates about an axis perpendicular to one end of the string. What is the length of the rotating string
It is 155cm from your eyes to your toes. You're standing 190cm in front of the tall mirror. How far is it from your eyes to the image of your toes.
At the instant shown, the spring is unstretched and B is moving downward at 4 ft/s. Use conservation of energy to identify velocity of B when it has moved downward 2 ft from its current position.
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