1. A 20 m long steel rail is firmly attached to the road bed only at its ends. The sun raisesthe temperature of the rail by 30°C, causing the rail to buckle. Assuming that the buckledrail consists of two straight parts meeting in the centre, calculate how much the centre ofthe rail rises? For steel a = 12 x 10-6/C.2. What should be the lengths of a steel and copper rod if the steel rod is 4 cm longer thanthe copper rod at any temperature. a(steel) = 1.1 x 10-5/C; a (copper) = 1.7 x 10-5/C.3. Two glass bulbs of volume 500 and 100 cc are connected by a narrow tube whose volumeis negligible. When the apparatus is sealed off, the pressure of the air inside is 70 cm ofHg and the temperature 20°C. What does the pressure become if the 100 cc bulb is keptat 20°C and the other is heated to 100°C?4. A bubble of gas rises from the bottom of a lake 30 m deep. At what depth will the volumebe thrice as great as it was originally (atmospheric pressure = 0.76 m of mercury; specificgravity of mercury = 13.6)?6. A 3.0 g bullet moving at 120 m/s on striking a 50 g block of wood is arrested within theblock. Calculate the rise of temperature of the bullet if (a) the block is fixed; (b) the blockis free to move. The specific heat of lead is 0.031 cal/g C.7. Calculate the difference in temperature between the water at the top and bottom of a 25m high waterfall assuming that 15% of the energy of fall is spent in heating the water (J =4.18 J/Cal).8. A piece of lead falls from a height of 100 m on to a fixed non-conducting slab which bringsit to rest. Show that its temperature immediately after the collision is raised byapproximately 7.1 K (the specific heat of lead is 30.6 cal/kg 0°C between 0 and 100°C).9. 1.36 kg of air are held at 6.89 kPa and 38 C. Given that Rair 88.89 J/kg-K, what is thevolume of the container?10. What is the change in internal energy of 2.27 kg of oxygen gas when the temperaturechanges from 38 C to 49 C? (c, = 0.658 kJ/kg-K)

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A 20 m long steel rail is firmly attached to the road bed only at its ends. The sun raises the temperature of the rail by 30-C, causing the rail to buckle. Assuming that the buckled rail consists of two straight parts meeting in the centre, calculate how much the centre of the rail rises? For steel a = 12 * 10%/C.

A 20 m long steel rail is firmly attached to the road bed only at its ends. The sun raises the temperature of the rail by 30-C, causing the rail to buckle. Assuming that the buckled rail consists of two straight parts meeting in the centre, calculate how much the centre of the rail rises? For steel a = 12 * 10%/C.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter19: Temperature, Thermal Expansion And Gas Laws

Section: Chapter Questions

Problem 21PQ: The distance between telephone poles is 30.50 m in a neighborhood where the temperature ranges from...

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