Question

4. When the temperature of a quantity of gas is increased A) the pressure must increase. B) the volume must increase. C) the pressure and/or the volume must increase. D) none of the above 5. The heat transfer process in which heat flows directly through the material is A) transition B) conduction C) convection D) radiation 6. Heating due to the greenhouse effect is caused by the fact that our atmosphere lets A) infrared wavelengths in but prevents heat loss at visible wavelengths B) ultraviolet wavelengths in but prevents heat loss at visible wavelengths c) visible light through but prevents heat loss at longer (infrared) wavelengths D) Visible light through but prevents heat loss at shorter (ultraviolet) wavelengths 7. Why is the air at higher altitudes cooler than that at lower altitudes? A) Because of the relation expressed in Charles Law, V/T - constant. B) because of the relation expressed in Gay-Lussac's Law, P/T = constant. C) Because of the relation expressed in Boyle's Law, PV = constant. D) None of above. 8. Latent heat is always A) part of the specific heat. B) related to the specific heat. C) the same as the mechanical equivalent of heat. D) involved in a phase change, 9. When a glass rod rubbed with silk acquires a positive charge, the silk acquires A) a positive charge B) a negative charge C) no charge D) it is impossible to tell which sign of charge it acquires

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Answer 1

4. When the tempreture of a quality of gas in - increased (C) the pressure and/or volume must increase pu=nRT TOP TLV - one among p or a must mcrease with increase in tempreture s. The heat transfer process in which heat flows directly flows through the material is conduction Heating due to the green-house effect is caused due to the fact out atmosphere lets visible light through but prevents heat loss at longer (infrared) wavelengths. - (c) Why air at higher altitudes cooler than air at lower altitudes, as we know Pressure at higher altitudes I is lower that at lower altitudes, As per Gay-Lussac's love, P/T = costat > PAT At higher altitudes Pressere ip low .. Tempreture is also low i Air is cooler. (6)