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Question
You are part of a team to help design atrium of a new building. Your boss, manager of the project, wants to suspend a 20-lb sculpture high over the room by hanging it from the ceiling using thin, clear fishing line (string) so that it will be complicated to see how the sculpture is held up. The only place to fasten the fishing line is to a wooden beam that runs around an edge of a room at the ceiling. The fishing line that she wants to use will hold 20 lbs (20-lb test) so she suggests attach two lines to the figure to be safe. Each line would come from an opposed side of the ceiling to attach to the hanging sculpture. Her first plan has one line making an angle of 20o with ceiling and other line making an angle of 40o with the ceiling. She knows you took physics, so she asks you if her plan can work.
A solid uniform disk of mass M = 9 kg and radius R = 29 cm rests with its flat surface on a frictionless table, What is the total kinetic energy of the disk
The velocity of a ball changes from m/s to m/s in 0.02 s, due to the gravitational attraction of the Earth and to air resistance. What is the rate of change of momentum of the ball
THe Voyager one has a 20-W radio transmitter and is expected to transmit to 2025 when it is 25 billion km from the earth. WHat's the Diameter of a dish antenna
climbers attempting to cross a stream place a 345 kg log against a vertical frictionless ice on the opposite side the log log is inclined at 27 degree, what is the maximum mass for a climber and pack to cross without the log slipping
Suppose you are riding a stationary exercise bicycle, and the electronic meter indicates that the wheel is rotating at 11.7 rad/s. how far would you have gone if the bike could move
Transcranial magnetic stimulation (TMS) is a noninvasive technique used to stimulate regions of the human brain. Determine the induced emf within a circle of tissue of radius 1.9 mm
A skier of mass 106 kg travels down a frictionless ski trail. If the top of the trail is a height 206 m above the bottom, what is the work done by gravity on the skier
two ocean liners with a mass of 50,000 metric tons are 50 m apart. What is the magnitude of the acceleration of one of the liners toward the other due to their mutual gravitational attraction
Calculate the acceptance cone angle for a fiber optic cable that has an index of 1.70 for the fiber core and a 1.47 index for the cladding. What is the acceptance cone angle
Consider a nonconducting rod that would make a great wire except for the fact that it is nonconducting, Find the electric field strength at a point on the axis of the rod
A sphere that is a perfect blackbody radiator has a radius of 0.140 m and is at 250°C in a room where the temperature is 27°C. find the net rate at which the sphere radiates energy.
How much kinetic energy will an electron gain (in joules) if it accelerates through a potential difference of 1.30×104V
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