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4. A bubble of gas rises from the bottom of a lake 30 m deep. At what depth will the volume be thrice as great as it was originally (atmospheric pressure = 0.76 m of mercury; specific gravity of mercury = 13.6)?

4. A bubble of gas rises from the bottom of a lake 30 m deep. At what depth will the volume be thrice as great as it was originally (atmospheric pressure = 0.76 m of mercury; specific gravity of mercury = 13.6)?

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th erall fises? For ste 2. What should the is. at any temperature, a(steen) at 20°C and the other is heated to 100 ? The sun raises ded centre of maon onger than = 1.70 volume cm of is kept 4. A bubble of gas rises from the bottom of a lake 30 m deep. At what depth will the volume be thrice as great as it was originally (atmospheric pressure = 0.76 m of mercury; specific gravity 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 the block. Calculate the rise of temperature of the bullet if (a) the block is fixed; (b) the block is 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 25 m 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 brings it to rest. Show that its temperature immediately after the collision is raised by approximately 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 the volume of the container? 10. What is the change in internal energy of 2.27 kg of oxygen gas when the temperature changes from 38 C to 49 C? (c = 0.658 kJ/kg-K)
Transcribed Image Text:th erall fises? For ste 2. What should the is. at any temperature, a(steen) at 20°C and the other is heated to 100 ? The sun raises ded centre of maon onger than = 1.70 volume cm of is kept 4. A bubble of gas rises from the bottom of a lake 30 m deep. At what depth will the volume be thrice as great as it was originally (atmospheric pressure = 0.76 m of mercury; specific gravity 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 the block. Calculate the rise of temperature of the bullet if (a) the block is fixed; (b) the block is 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 25 m 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 brings it to rest. Show that its temperature immediately after the collision is raised by approximately 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 the volume of the container? 10. What is the change in internal energy of 2.27 kg of oxygen gas when the temperature changes from 38 C to 49 C? (c = 0.658 kJ/kg-K)
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