The highest registered waterfalls in the world are those of Angel Falls, which is located in Venezuela. Its longest single waterfall has a height of 807 m. If the water at the top of the falls is 18.0 ° C, what is the maximum temperature (in degrees C) of the water at the bottom? Suppose that when all the kinetic energy of the water reaches the bottom, the temperature of the water increases.

Which of the following statements correctly relates temperature and kinetic energy? A Substances whose molecules have low kinetic energy have high temperatures. Substances with high kinetic energy in their molecules have low temperatures. C The higher a substance's temperature, the greater the kinetic energy of its molecules. The lower a substance's temperature, the greater the kinetic energy of its molecules.

Question 11 After some time, you pour 0.5 kg of milk, whose initial temperature was 5°C. What will be the final equilibrium temperature of this system? Let: 1.5 kg of coffee, originally at 90°C, is placed into a .3 kg aluminum cup. J Ccoffee = 4186 kg K J CAI = 500 kg K J CMilk = 3000 kg K Question 12 A solid steel sphere of radius 50 acts as a perfect radiator, calculate the amount of heat it will radiate after 1 min. cm is heated to 3000 K. If the sphere

You drop an ice cube into an insulated flask full of water and wait for the ice cube to completely melt. The ice cube initially has a mass of 90.0 g and a temperature of 0°C. The water (before the ice cube is added) has a mass of 850 g and an initial temperature of 22.0°C. What is the final temperature (in °C) of the mixture? (Assume no energy is lost to the walls of the flask, or to the environment.)  °C

A 50.0-g piece of brass (specific heat 380 J/kg K) is heated to 90.0° C and immersed in 100 g of water (specific heat 4184 J/kg K), initially at 15.0° C c. The well-insulated container is then sealed and allowed to reach thermal equilibrium. What is the final temperature of the system? 18.3° C 13.7° С 24.8° C 36.3° C 12.9° C

Lead pellets, each of mass 1.60 g, are heated to 200°C. How many pellets must be added to 451 g of water that is initially at 20.0°C to make the equilibrium temperature 25.0°C? Neglect any energy transfer to or from the container.

A 0.0500-kg ice cube at −30.0°C is placed in 0.350 kg of 35.0°C water in a very well-insulated container. What is the final temperature in degrees Celsius?

A rod made of glass has a circular cross section with a diameter of 0.1200 m at a temperature of 20 degrees celsius. An aluminum ring has a diameter of 0.1196 m at a temperature of 20 degrees celsius. The coefficients of thermal expansion for glass and aluminum are 9.0 x 10-6 1/K and 24.0 x 10-6 1/K, respectively. At what temperature will the aluminum ring be able to slip over the glass rod? Between 225 and 250 degrees celsius Between 175 and 200 degrees celsius Between 100 and 125 degrees celsius Higher than 300 degrees celsius Between 250 and 275 degrees celsius Between 125 and 150 degrees celsius Between 275 and 300 degrees celsius Between 150 and 200 degrees celsius O Between 200 and 225 degrees celsius

Two surfaces, one highly polished and the other heavily oxidized, are found to be emitting the same amount of energy per unit area. The highly polished surface has an emissivity of 0.1 at 1070°C, while the emissivity of the heavily oxidized surface is 0.78. Determine the temperature of the heavily oxidized surface.

A bar of aluminum (bar A) is in thermal contact with a bar of iron (bar B) of the same length and area (see the figure below). One end of the compound bar is maintained at Th = 82.0°C, and the opposite end is at 30.0°C. Find the temperature at the junction when the energy flow reaches a steady state. °C