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A) Steel train rails are laid in 12.2 m -long segments placed end to end. The rails are laid on a winter day when their temperature is-2.00degrees C. How much space must be left between adjacent rails if they are just to touch on a summer day when their temperature is 33.0 degrees C ?
d = _____ mm
B) If the rails are mistakenly laid in contact with each other, what is the stress in them on a summer day when their temperature is 33.0 degrees C ?
= _____ Pa
A 0.117 kg meterstick is supported at its 37.7 cm mark by a string attached to the ceil- ing. A 0.624 kg mass hangs vertically from the 4.04 cm mark. A mass is attached somewhere on the meterstick to keep it horizontal and in both rotational and t..
Suppose the tension in a cord is 12.0 N. If the speed of a wave in the cord is 9.50 m/s, then what must be the linear mass density of the cord
Three charged particles are placed at each of three corners of an equilateral triangle whose sides are of length 2.8 . Two of the particles have a negative charge: = -6.7 and = -13.4 . The remaining particle has a positive charge, = 8.0 . What is ..
One particle has a mass of 4.41 x 10-3 kg and a charge of +6.92 ?C. A second particle has a mass of 6.52 x 10-3 kg and the same charge. Find the initial separation between the particles
For instance, the flute can be described as an open-open pipe because a flutist covers the mouthpiece of flute only partially. Meanwhile, a clarinet can be described as an open-closed pipe as the mouthpiece of the clarinet is almost completely closed..
Illustrate at what horizontal distance, x, from the base of the building will the rock strike the ground? Assume the ground is level and that the side of the building is vertical. The acceleration of gravity is 9.8 m/s2 .
The potential difference between two parallel conducting plates in vacuum is 165 V. An alpha particle with mass of 6.50×10-27 kg and charge of 3.20×10-19 C is released from rest near the positive plate. What is the kinetic energy of the alpha particl..
An alpha particle (helium nucleus, charge 2e) starts from rest and travels a distance of 1.88 cm under the influence of a uniform electric field of magnitude 12.2 kV/m
You're the operator of a 1.20×104 V rms, 60 Hz electrical substation. When you get to work one day, What is the rms current leaving the station
A particle of charge +9.2 ?C is released from rest at the point x = 55 cm on an x axis, What is the kinetic energy of the particle at the instant it has moved 12 cm if Q = +61
The 1992 wold speed record for a bicycle (human powered vehicle)was set by Chris Huber. His time through the measured 200 m stretchwas was a sizzling 6.509 s, at which he commented, "Cogito ergozoom!"
Suppose that the coefficient of kinetic friction between Zak's feet and the floor, while wearing socks, is 0.250. Knowing this, what distance d will he slide before stopping
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