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A U.S. penny has a diameter of 1.9000cm at 20.0 C . The coin is made of a metal alloy (mostly zinc) for which the coefficient of linear expansion is 2.6e-5 K^-1. What would its diameter be on a hot day in Death Valley ( 46 C)? On a cold night in the mountains of Greenland (-54C)?
It is found that a uniform amount of electrical flux is going through each region of a Gaussian surface shaped like a cube. What amount of charge is there inside the sphere
A certain alarm clock ticks four times each second, with each tick representing half a period. What is the torsion constant of the hairspring
A person pulls a 5.0 kg sled by a rope across a floor. The coeffecient of kinetic friction between the floor and the sled is 0.15. What is the horizontal acceleration of the sled
Find out the velocity of the plane relative to the earth.
As part of a safety investigation, two 1200 {rm kg} cars traveling at 24 {rm m/s} are crashed into different barriers. Find the average forces exerted on (a) car that hits a line of water barrels and takes 1.80 {rm s} to stop, and (b) car that hits a..
When mass M is tied to the bottom of a long, thin wire suspended from the ceiling, the wire's second-harmonic frequency is 150Hz . Adding an additional 1.5kg to the hanging mass increases the second-harmonic frequency to 270Hz.
q1. kelli weighs 417 n and she is sitting on a playground swing that hangs 0.44 m above the ground. her mom pulls the
A 3.5-kg block of iron (c=0.11 kcal/kgoC) that has been brought to a temperature of 1,063oC is placed on top of a 2.5-kg block of ice (c=0.5 kcal/kgoC) that has been cooled to -50oC
A 50.0-g object is attached to a horizontal spring, What is the velocity of the object when it is halfway to the equilibrium position if the surface is frictionless
A disk7.97cm in radius rotates at a constant rate of1160rev/min about its central axis. Determine the radial acceleration of a point on the rim
A fish swimming in a horizontal plane has a velocity vi = (3.3i + 1.6j) m/s at a point in the ocean where the position relitive to a certian rock is ri = (10.5i - 3.9j) m. After the fish swims with a constant acceleration for 20.6 s, it's velocity..
The 5.35- kg weight that drives the time mechanism of a grandfather clock descends 19 cm in exactly 24 hours. What power is delivered to the mechanism
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