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The distance between 2 telephone poles is 50.0 m. When a 1.00 kg bird lands on the telephone wire, midway between the poles, the wire sags 0.200 m. (a) Draw a free-body diagram of the bird. (b) How much tension does the bird produce in the wire? Ignore the weight of the wire.
An energy storage system based on a flywheel (a rotating disk) can store a maximum of 3.2 MJ, What is the moment of inertia of the flywheel
A semi-trailer is coasting downhill along a mountain highway when its brakes fail. The driver pulls onto a runaway truck ramp that is inclined at an angle of 15.0° above the horizontal. What was the truck's initial speed
A student uses an audio oscillator of adjustable frequency to measure the depth of a water well. What is the depth of the well
Sixty-seven million years ago, a large asteroid impacted Earth. It is widely accepted in the field of paleontology that this impact played a large role in a mass extinction that included all dinosaurs, find the change in the angular velocity of th..
During the "heavy bombardment" period of our solar system astroids slammed into earth with large speeds thus resluting in earth becoming warmer. What form did the energy take before it was heat
q1. a 28-rm cm-diameter vertical cylinder is sealed at the top by a frictionless 25 kg piston. the piston is 87 cm
A 81.0kN spaceship comes in for a vertical landing. From an initial speed of 1.00 km/s, What braking force must its rockets provide
An astronaut is being tested in a centrifuge. The centrifuge has a radius of 3.58 m, what is the magnitude of the astronaut's linear speed
A 0.34 kg iron horseshoe that is initially at 616 ?C is dropped into a bucket containing 25 kg of water at 28 ?C. What is the final equilibrium temperature? Avoid any energy transfer to or from the surroundings and assume the specific heat of iron is..
A wave traveling in the +x direction has an amplitude of 0.421 m, Write the equation of the wave
briefly discuss the advantages and disadvantages of pushing or pulling a vacuum cleaner or lawn mower or assisting
three 0.04 kg particles have been glued to a rod of length L = 13 cm and negligible mass and can rotate around a perpendicular axis through point O at one end. How much work is required to change the rotational rate
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