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A person of mass 75 kg stands at the center of a rotating merry-go-round platform of radius 3 m and moment of inertia 920 kg*m^2. The platform rotates without friction with angular velocity 2 radians/sec. The person walks radially to the edge of the platform.
(a) Calculate the angular velocity when the person reaches the edge.
(b) Calculate the rotational kinetic energy of the system of platform plus person before and after the person's walk. Show all work and formulas for best rating.
One mole of a monatomic gass initially at 273 K and 1 atm is compressed isothermally (T constant) from volume 22.4 L to 11. 4 L, Find the final pressure and draw a PV diagram, Labeling the initial and final states 1 and 2
The blade of a windshield wiper moves through an angle of 90.0° in 0.432 s. What is the magnitude of the centripetal acceleration of the tip of the blade
Two cars start from rest at a red stop light. When the light turns green, both cars accelerate forward, What is the total time the blue car is moving, What is the acceleration of the yellow car
A uniform plank of length 6m and weight 211N rests horizontally on two supports, with 1.1 m of the plank hanging over right support. To what distance x can a person who weighs 442N walk on the overhanging part of the plank before it just begins to..
A solar cell generates a potential difference of 0.95 V when a 380 ? external resistance is connected across it, What is the internal resistance of the solar cell
Assume we have an infinitely long wire carrying a current of 2.50 A. It is bent into an L-shape extending into positive infinities along x- and y- axes. Find out the magnitude of the magnetic field at a point P with coordinates (0.30 m, 0.30 m)
Obtain a relation between the equilibrium lattice distance
Trucks with diesel engines have an efficience of about 40%. How much energy is requried to accelerate an 8,000kg truck from rest to 25 m/s
A neodymium laser emits a pulse of radiation, providing 125 TW of power for a duration of 1.00 ns. How much energy is contained in that pulse
What is the net electric force acting on particle.
A high energy photon is scattered at an angle of ?=180.0° from an electron that is initially at rest. Find the energy of the incident X-ray photon
Consider a series RLC circuit where R = 549 ? and C = 1.25 ?F. However, the inductance L of the inductor is unknown. To find its value, What is the inductance of the inductor in millihenrys
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