A cup of water is heated with a heating coil that delivers 100 W of heat. In one minute, the temperature of the water rises by 20°C. What is the mass of the water?A. 72 g                B. 140 gC. 720 g              D. 1.4 kg

An aluminum cup contains 225 g of water and a 40-g copper stirrer, all at 27°C. A 492-g sample of silver at an initial temperature of 86°C is placed in the water. The stirrer is used to stir the mixture gently until it reaches its final equilibrium temperature of 32°C. Calculate the mass of the aluminum cup. ?g

2.00 mol of gas at a temperature of -160 °C fills a 2.70 L container. What is the gas pressure? Express your answer with the appropriate units. μÅ Value Submit Units ? Previous Answers Request Answer

A 100 g rock at 30°C is completely immersed in970 g of water at 50°C. Which one of the following statements is true right after the rock goes in?     a. It depends on the specific heat of the rock. b. The rock gives the water thermal energy and gets no thermal energy in return. c. The rock and the water give each other thermal energy, but the rock gives more than it gets. d. The rock and the water give each other thermal energy, but the water gives more than it gets.

A container holds 2.3 mol of gas. The total average kinetic energy of the gas molecules in the container is equal to the kinetic energy of a 8.7x10-3 kg bullet with a speed of 870 m/s. What is the Kelvin temperature of the gas? Number i Units

5. A gas with volume V, pressure P, and temperature T is inside a container with a moveable piston. No gas is leaking from the container as the temperature of gas is quadrupled while the volume is doubled. What will be the new pressure?  A. 2P   B. P   C. 1/2 P   D. 8P

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

100 grams of Aluminum ( c = 0.9 j/gC) at 100 C is added to 100 grams of water (c = 4.19 j/gC) at 20 C. The final temperature of the mixture will be Group of answer choices A. Less than 60 C B. 60 C C. More than 60 C

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The heat conducted through a bar depends on which of the following? A. The coefficient of linear expansionB. The thermal conductivityC. The specific heat capacityD. The length of the barE. The cross-sectional area of the bar     A, C, and D   A, B, and D   B, C, D, and E   B, D, and E   C, D, and E