Ice is added to hot tea in a thermos and then, the thermos is closed. The energy loses through the thermos lid and walls are negligible. When the system including ice and water reached thermal equilibrium, the energy of ice increased by 10 J. How did the internal energy of ice change? Assume the thermos being at rest. а. Unknown b. Did not change С. Increased by 10J d. Decreased by 10J

This question requires the use of the extracts from the tables of thermodynamic properties supplied. Ammonia, NH3, was once a commonly used refrigerant. In a particular (very old) refrigeration plant, ammonia has a pressure of 6.1 bar and a temperature of 110 °C. What would be the specific enthalpy of the ammonia under these conditions. a. 1622 kJ/kg O b. 1702 kJ/kg 1454 kJ/kg O d. 228 kJ/kg 1583 kJ/kg O C. e.

1. If two systems are in thermal equilibrium with a third system, then they are in thermal equilibrium with each other   True   False   Neither true nor false   Applicable in all situations

Assume the following: ●In a light water reactor, approximately 1.0kg of spent nuclear fuel is produced for every50. megawatt-days (MWd) of thermal energy input. ●For the purposes of this analysis, assume the spent nuclear fuel produced is 1.8% Pu-240by mass. Pu-240 has a half-life of 6,430 years. ●The thermal efficiency of the power plant is 38% ●Use equation for radioactive decay: ​Q​t​= Q​0​^e​-kt​ where: ○Q​t​ = quantity of radioactive material at time t ○Q​0 ​= original quantity of radioactive material ○k = the decay constant ○t = time interval in years ○The decay constant k is defined by the relation: Half life = ln(2)/k   Diablo Canyon stores 95% of its spent nuclear fuel onsite. ii) How many metric tons of Pu-240 in the spent fuel will still be onsite in that year?

Each of the following statements describes a way of coping with temperature variation. Which scenario most likely includes positive heat transfer through convection? That is, in which scenario does Hconvection most likely have a positive (+) sign? Hanimal = +SR + IRin – IRout +/- Hconvection +/- Hconduction - Hevaporation + Hmetabolic Select one: a. A rabbit basking in the sun early in the morning. b. A lizard resting in the shade in a hot desert in the middle of the day. c. A bumblebee vibrating its flight muscles before flight. d. A ground squirrel hibernating in the winter. e. A bird fluffing its feathers on a cold day.

A pneumatic cylinder moves a box on an assembly line by 2 ft by applying a continuous force of F= 275 Ibf for 0.5 seconds. a. How much work was done by the cylinder? W =. b. What was the power output? P =. c. If 1 hp = 550 ft.lb/s, express the power output in horsepower: HP =

By the sign convention, work is positive when a system does work on its surroundings. True False

VO2 (mL. kg. min ¹)-(0.1. S)+(1.8. S. G) 3.5 VO2 (mL. kg¹. min ¹1)-(0.2.5) + (0.9. S. G) 3.5 VO2 (ml. kg¹. min¹)-((10.8. watts)/BM)+7 Where S-velocity (m.min) G-gradient (expressed as a decimal, so 5% -0.05) During working maintain 4 d.p. Round answer to whole numbers. During working maintain 4 d.p. Round answer to whole numbers. What is the caloric expenditure for a 90kg client who cycles at 250W for 10 minutes? O a. 167 k.cal O b. 160 k.cal O c. 37 k.cal O d.67 k.cal O e. 173 k.cal Hand written plz