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A steel wire of length L=2.0 m with cross section A=0.5cm2 is supported from one end by the ceiling, and on theother end is attached a weight of 400 N.
a) Calculate the elongation of the wire.
b) Does the tensile force on the wire caused by the weightexceeds the tensile limit of the steel wire?
What is the velocity of a beam of electrons that go undeflected when passing through perpendicular electric and magnetic fields of magnitude 8.8x103 V/m and 3.5x10-3 T respectively
A piece of metal is pressed against the rim of a 2.8- kg, 25- cm-diameter grinding wheel that is turning at 2800 rpm. how much force must you press to stop the wheel in 20.0 s
A bowling ball encounters a 0.760-m vertical rise on the way back to the ball rack, as the drawing illustrates. Find the translational speed at the top
liquid water at 20 degrees c has a constant pressure mass specific heat of cp4181.8. suppose that 1kg of liquid water
A flat sheet of crystalline quartz has a thickness of 2.1 cm. It is on top of a flat sheet of diamond that has a thickness of 3.0 cm. how far would it have traveled in a vacuum
A coating is applied to a lens to minimize reflections. The index of refraction of the coating is 1.50, and that of the lens is 1.48. If the coating is 177.5 nm thick, what wavelength is minimally reflected for normal incidence in the lowest order? n..
a block of mass m=0.2kg , in simple harmonic motion, has an amplitude of 3.5cm and a maximum speed of 70 cm/s. What is the angular frequency for the oscillation in rad/s?
You are driving down the road at 60 km/hr when you see a chicken dash out onto the road 23.3 m in front of you. What was your reaction time
Eight identical light bulbs are connected in parallel with a 120-V power source, by two long leads with resistance 1.4 Ohms. 210 mA flow through each bulb, What is the resistance of each bulb
A silver medallion is sealed within a transparent block of plastic. How far below the top surface would the medallion appear if the observer (not wearing goggles) and the block were under water
A proton is traveling due west with a speed of 4.00 x 10^5 m/s and enters a magnetic field of 5.00 x 10^-5 T directed at 30.0 degrees to the direction of the proton's motion. Determine the magnitude and direction of the force of the proton.
An ideal gas at 26.9°C and a pressure 1.60 105 Pa is in a container having a volume of 1.00 L. Find the number of moles of gas
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