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The length of a beam increases by 1.26mm when its temperature is raised from 29.87oC to 71.49 oC. What is the length of the beam at the initial temperature? The thermal expansion coefficient of the material is 0.000025 /oC.
A positive point charge Q1 = 5.0*10-5 C is fixed at the origin of coordinates, Find the location(s) where the total electric field is equal to zero
Two identical 1.70kg masses are pressed against opposite ends of a spring of force constant 1.70N/cm, Find the maximum speed of each mass when it has moved free of the spring on a smooth
Your medieval history class is constructing a trebuchet, a catapult-like weapon for hurling stones at enemy castles, Find an expression for the angle that will maximize the range of a projectile launched with speed from height above level ground
what is the distance between town and john's current location? Illustrate what is john's current location?
A 54 N crate is suspended from the left end of a plank. The plank weighs 21N, but it is not uniform, so its center of gravity does not lie halfway between the two ends. The system is balanced by a support that is 0.3m from the left end of the plan..
A machine part is made from a uniform solid disk of radius R = 0.18m and mass M = 8.3kg. A hole of radius R/2 is drilled into the disk, with center of the hole at the distance R/2 from the center of the disk.
With what tension should a rope with length 3.00m and mass 0.135kg be stretched for transverse waves of frequency 43.0Hz to have a wavelength of 0.720m. What torque does friction exert even as this wheel is slowing down.
The focal length of a relaxed human eye is approximately 1.71 cm, Calculate the focal length of the eye when we focus closely
Two converging lenses are placed 88.0 cm apart. An object is placed 1.100 m to the left of the first lens, What is the focal length of the second lens
A ship sets out to sail to a point 148km due north. An unexpected storm blows the ship to a point 109km due east of its starting point.
A flat sheet of crystalline quartz has a thickness of 3.7cm. It is on top of a flat sheet of diamond that has a thickness of 2.6cm. Light strikes the crystalline quartz vertically and travels through it and then through the diamond.
The mass of Mercury is 0.0550 times that of earth, and its radius is 0.380 times that of earth, Calculate the average density of Mercury (in kg/m3) given the earth's density is 5.52×103 kg/m3
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