It is possible to raise the temperature of a material without adding heat to it (remember delta U = W + Q). Group of answer choices: A. True B. False

15. The adiabatic index of a gas is given by which of the following? a. Cp/Cv b. Cv/Cp C. Cp-Cv d. Cpt Cv O B D OA OC Question 10 C

A molecule in Earth's atmosphere at 20 °C has a most probable energy      E = kT/2 = 2.02 ×10-21 J     E = kT =4.04 ×10-21 J     E = 3 k T / 2 = 6.1 ×10-21 J     that depends on the mass of the molecule

Choose the correct answer 1. You have a 90 cm long iron rod at 15 ° C that heats up to 300 ° C. What happens with the rod is that: A. It melts. B. Double the length. C. Decrease its length a few centimeters. D. Increase its length by a few millimeters. 2. A student blows up a balloon and places it in his home freezer. After a long time, the balloon is removed from the freezer and it is observed that: A. The volume decreases as a certain amount of air escapes. B. It remains the same, because the air inside it does not expand or contract. C. The volume increases, because the air inside it expands D. The volume decreases as the air inside it contracts

One mole of oxygen gas is at a pressure of 5.45 atm and a temperature of 27.5°C. (a) If the gas is heated at constant volume until the pressure triples, what is the final temperature? °C (b) If the gas is heated so that both the pressure and volume are doubled, what is the final temperature? °C Submit Answer

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4. Ideal Gas Type Question: A piston comprises two nested cylinders which are 3 cm and 2.8 cm in diameter with 0.1 cm thick walls and are each 1 m long. Initially, the smaller cylinder sits completely inside the larger cylinder and is filled with N2 at 20 °C and atmospheric pressure. a. C. The gas is slowly heated, while the cylinder is allowed to freely expand. What kind of process is this? banc b. The smaller cylinder has a total mass of 1.5 kg. What temperature does the gas need to be for the cylinder to become fully extended? The cylinder can withstand an internal pressure of 20 atm. What's the maximum weight it can lift? e. d. A 100 kg weight is dropped on the cylinder while it is fully extended, causing it to rapidly compress. What kind of process is this? If the cylinder is fully depressed by this event, what is the peak pressure? The adiabatic constant for N2 is 7/5. f. If the weight is dropped from 2 m, assuming 1% of its energy is converted into thermal energy in the gas,…

A hot air balloon uses the principle of buoyancy to create lift. By making the air inside the balloon less dense then the surrounding air, the balloon is able to lift objects many times its own weight. A large hot air balloon has a maximum balloon volume of 2090 m3. a.  If the air temperature in the balloon is 54 °C, how much additional mass, in kilograms, can the balloon lift? Assume the molar mass of air is 28.97 g/mol, the air density is 1.20 kg/m3, and the air pressure is 1 atm.

20. Consider the following data: AT (°C) AL (mm) 10 20 1.1 30 2.1 40 3.07 You have to plot a graph of these values, and you are given graph paper, where one side of the graph paper has 8 large blocks. You have to place change in length on the side with the 8 large blocks. What would be the best scale for your graph? A. 0.01 mm:1 block B. 0.2 mm:1 block C. 0.03 mm:1 block D. 0.5 mm:1 block E. 1 mm:1 block F. 2 mm:1 block