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A girl pushes a merry go round until it is rotating with angular velocity of 1 rpm. The merry-go-round is a uniformly massive disc with mass M = 800 kg and a radius R = 2 m. The girl has mass m = 40 kg. (Treat the girl as a point mass)
(a) The girl jumps onto the edge of the merry-go-round. What is the angular velocity of the merry-go-round after she lands?
(b) The girl walks to the center of the merry go round. Does the kinetic energy or the angular momentum of the merry-go-round plus girl change? If so, by how much?
A 70-kg log falls from a height of 25 m into a lake. If thelog, the lake, and the air are all at 300K, find the change inentropy of the Universe for this process
Two parallel inducting wires each carry a current of 50A. Theforce per unit length between these wires is equal to the force ofthe gravitational pull on wire 1m long. calculate the distance d between the two parallel wires
An equilateral triangle has sides of lengthL. Charges of +Q,-2Q,and +3Q are placed at the vertices. Find the electric field midway between the two positive charges
You have a string with a mass of 14.1 g. You stretch the string with a force of 8.63 N, giving it a length of 1.93 m. Then you vibrate the string transversely at precisely the frequency that corresponds to its fourth normal mode, that is, at its f..
A star has a planet held in orbit by gravitational attraction. If the mass of the star were doubled, what effect would this have on the gravitational attraction between the star and its planet ? If the distance between the stars and planet were 3 ..
What is the interference pattern generated from three slits? The slit separation is, hand they are a distance, d from the screen. Utilize complex notation to solve this problem.
Determine what magnifying power is attained using a compound microscope with the following specifications: objective focal length is 1.50 centimeter
Consider the interface between atmospheric air and a body of water, both at 17 °C. What are the mole and mass fraction of water at the air side of the interface? At the water side of the interface?
Create a 50-word summary, in your own words, that describes which constellations are visible at night and how this changes over the night and over the year. Feel free to create and label sketches to illustrate your response.
A concave mirror (R=64.0cm) is used to project a transparent slide onto a wall. how far from the mirror should the wall be set
1) A 2.00-m rod of negligible mass connects two very small objects at its ends. The mass of one object is 1.00 kg and the mass of the other is unknown. The center of mass of this system is on the rod a distance 1.60 m from the 1.00-kg mass object...
Wildlife biologists fire 20-g rubber bullets to stop a rhinoceros charging at 0.81m/s. What impulse does each bullet deliver
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