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A steel beam is utilized in the construction of a skyscraper. By what fraction ΔL/L0 does the length of the beam increase when the temperature changes from that on a cold winter day (-23.4 °F) to that on a summer day (+108°F)?
From the top of a 30ft building, the angle of depression to the foot of a building across the street is 70 degrees and the angle of elevation to the top of the same building is 71degrees( how tall is he building across the street ?)
Obtain the Fourier representation of the output of a full-wave rectifier. Plot the first three terms in the expansion and compare with the exact function
A spring loaded ballistic pendulum gun requires an increasing force to load. Calculate the speed of the ball as it leaves the gun
A 10-kg box is at rest at the end of an unstretched springwith constant k=4000 N/m. What is the amplitude of the resulting oscillation of this system
q1. a box of books weighing 352 n moves with a constant velocity across the floor when it is pushed with a force of 448
Mercury is approximately a sphere of radius 2.43 x 106 m. What is its circumference in kilometers and What is its surface area in square kilometers
A 820 kg- sports car collides into the rear end of a 2700 kg- SUV stopped at a red light. calculates the speed of the sports car at impact
Scientists plan to release a space probe that will enter the atmosphere of a gaseous planet. What is the approximate temperature at this altitude
what is the electric force between the proton and electron inside of a hydrogen atom? What must the speed of the electron be? Radius=0.47 x 10^-9.
a disk of mass m and radius r starts form rest at the top of a 30 degree incline with a height of 2m. if the disk rolls
A charge -Q is uniformly distributed along a circular arc of radius R beginning on the +y axis and ending on the -x axis. Find the electric potential at the origin
A parallel-plate capacitor is formed from two circular 20-cm-diameter plates spaced 1.0 mm apart. What is the charge (in nC) on the positive plate
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