Question

tension), when the whole system is at 0 °C. What is the tensile stress in the steel wires when the temperature of the system is raised to 300 °C? Make any simplifying assumptions you think are justified, but state what they are. BRASS 1881 A steel bomb is filled with water at 10 °C. If the entire bomb is heated to 75 °C and no water is allowed to escape, compute the increase in pressure in the bomb. Assume the bomb to be sufficiently strong so that it is not stretched by the increased pressure. Use Bter the range from 10°C+75°C. steel wire 3.9 x 10 C in Steel railroad rails 60 ft long are laid on a winter day when the temperature is 20 °F. (a) How much space must be left between rails if they are to just touch on a summer day when the temperature is l10 °F? (b) If the rails were originally laid in contact, what would be the stress in them on a summer day when the temperature is l10 °F? 1882 1883 A liquid is enclosed in a metal cylinder provided with a piston of the same metal. The system is originally at atmospheric pressure and at a temperature of 80 °C. The piston is forced down until the pressure on the liquid is increased by 100 atm, and it is then clamped in this position. Find the new temperature at which the pressure of the liquid is again 1 atmosphere. Assume that the cylinder is sufficiently strong so that its volume is not altered by changes in pressure, but only by changes in temperature. Compressibility of liquid (k)-50 x 10 atm. Cubical coefficient of expansion of liquid (B)-5.3 x 10C. Linear coefficient of expansion of metal (a)- 10 x 10 °C

#1883. show steps and equations used. Answer in the back of the book is 70 degrees celcius.

Answer 1

153 AR. k P, at 100 2- V AV V.

2 NO needs to ol atm Terp PrtOLatn P 드 aotnn SoaLa A LOOxSaxio A-/199xSx1 200 nerease

3 Apecet Chy Volume inVolue Volu imder to AVA Nt Vz(AT) (BI) Liquid-(cubicua). pMela (linem

Sto AT