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Hint: Apply Conservation of Angular Momentum to find the new speed of the puck,then calculate the change in Kinetic Energy to find the work that was done on the puck.The puck in the figure has a mass of 0.173 kg. Its original distance from the center of rotation is 30 cm, and the puck is moving with a speed of 72.1 cm/s. The string is pulled downward 19.5 cm through the hole in the friction less table. What is the magnitude of the work was done on the puck? Treat the hockey puck as a point mass. Answer in units of J.
A loudspeaker of mass 19.0 kg is suspended a distance of h = 2.00m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l= 3.50m. Illustrate what is the tension T in each of the cables?
A tank having a volume of 0.11 m3 contains helium gas at 170 atm. How many balloons can the tank completely fill
At what angle have to the laser beam in the diagram be aimed at mirrored ceiling in order to hit the midpoint of the far wall? The length of the room is a=4.9 m and its height is b=3.00 m.
A solid ball of mass M and radius R starts from rest and rollswithout slipping down a hill; Find the ball's speed at thebottom of the hill
On a distant planet, golf is just as popular as it is on earth. On the distant planet, what is the maximum height of the ball
A race driver has made a pit stop to refuel. After refueling, he starts from rest and leaves the pit area with an acceleration whose magnitude is 5.3 m/s2; How much time is required for the entering car to catch up with the other car
A boxer swings with a roundhouse punch to an opponent's head. Determine the velocity of her glove when it makes contact in m/s
A string is clamped at one end and the other end rests on a light, frictionless pulley with a mass hanging below it to provide a tension. What is the mass on the end of the string
Using this information, find the temperature of the Sun's surface as well as the wavelength at which stellar emission reaches maximum.
A particular satellite was placed in a circular orbit about 158 mi above Earth. (a) Determine the orbital speed of the satellite. m/s (b) Determine the time required for one complete revolution.
q1. calculate the de broglie wavelength of the electron in the n1 state of the hydrogen atom.q2. calculate the de
The bulk modulus for helium is 1.01x105 N/m2 and its density is 0.179 kg/m3. How many times the speed of sound in air (331m/s) is the speed of sound in helium?
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