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A pair of eyeglass frames are made of an epoxy plastic (coefficient of linear expansion = 1.30 10-4°C-1). At room temperature (20.0°C), the frames have circular lens holes 2.10 cm in radius. To what temperature must the frames be heated if lenses 2.11 cm in radius are to be inserted into them?
A ball is held on an incline at the height of 72 cm. it is then released so that the ball rolls down the incline. At the bottom of the incline there is a loop where the ball rolls around in. If the loop is 62 cm high at its highest point what is the ..
A 3 kg object id released from rest at a height of a 5 meter curved frictionless ramp. At the foot of the ramp is a spring force constant of k= 400n/m the object slides down the ramp and onto the spring compressing it to the distance x before comi..
What is the kinetic energy of a carbon atom moving with a speed of 500 m/s.
Light of wavelength 670nm falls on two slits and produces an interference pattern in which the third-order bright red fringe is 49mm, What is the separation of the two slits
A spaceship travels at a constant speed from earth to a planet orbiting another star. When the spacecraft arrives, How far away is the planet according to observers on earth
Three charged particles are arranged on corners of a square as shown in the figure below, with charge, What is the direction of the electric field at the upper right corner, which is a point in empty space
A 4.20 kg sphere makes a perfectly inelastic collision with a second sphere that is initially at rest, What is the mass of the second sphere
In a classical model of the hydrogen atom, the electron orbits a stationary proton in a circular orbit
An ac voltage source is connected in series with a1.4-?F capacitor and a 690-? resistor. Using a digital ac voltmeter, the amplitude of the voltage source is measured to be 4.0?V rms, Determine the frequency of the ac voltage source
When the walkway exerts a load force of 9900 N on one of the support points, through what distance does the point move down?
A 22-L sample of air at 298K contains 0.10 grams of water vapor. What is the relative humidity of the air
A 45.8-kg girl is standing on a 161-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, flat surface. What is the velocity of the plank relative to the ice surface
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