Question

32. Suppose a woman does 650 J of work and 9700 J of heat is transferred...

32. Suppose a woman does 650 J of work and 9700 J of heat is transferred from her into the environment in the process.

  1. What is the change in her initial energy, in joules, assuming she does not consume any food?
  2. What is her percent efficiency?

Homework Answers

Answer #1

Please rate it up, Thanks!

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Find the change in internal energy of a system if 75 J of heat is transferred...
Find the change in internal energy of a system if 75 J of heat is transferred to it, and the system does 45 J of work on the surroundings. If there is no change of state, what happens to the temperature.
1A: During a process, 28 J of heat are transferred into a system, while the system...
1A: During a process, 28 J of heat are transferred into a system, while the system itself does 14 J of work. What is the change in the internal energy of the system?    __________ J 1B: If the internal energy of an ideal gas increases by 170 J when 250 J of work are done to compress it, how much heat is released?    __________ J 1C: It takes 270 cal to raise the temperature of a metallic ring...
A sample of gas is contained in an expandable balloon. 10 KJ of heat is transferred...
A sample of gas is contained in an expandable balloon. 10 KJ of heat is transferred to the gas which causes the balloon to expand at constant pressure. If the internal energy of the gas does not change during this process, calculate the work done and the change in volume ( in L) of the balloon. ( the pressure of the surroundings is 1030 mBar). ( 1 J= 1 Pa m^3 )
1. A gas does 800 J of work to expand and push a piston. If the...
1. A gas does 800 J of work to expand and push a piston. If the total energy of the gas does not change, what is the heat for this process? Take the bold work to be the system. 2. Sodium dimer (Na2) has a vibrational constant of 159.13 cm-1. Calculate the vibrational partition function of Na2 to three significant figures at 300 K. The degeneracy is 1. 3. Calculate the work done (in J) when the volume of an...
1. During an isothermal process, 65.999 J of heat is removed from an ideal gas. What...
1. During an isothermal process, 65.999 J of heat is removed from an ideal gas. What is the change in internal energy? 2. A heat engine absorbs 183.569 kcal of heat each cycle and exhausts 11.286 kcal. Calculate the percent efficiency of each cycle.
1-11)A 48-kg woman cheats on her diet and eats a 670-Calorie (670 kcal) jelly doughnut for...
1-11)A 48-kg woman cheats on her diet and eats a 670-Calorie (670 kcal) jelly doughnut for breakfast. (a) How many joules of energy are the equivalent of one jelly doughnut? J (b) How many stairs must the woman climb to perform an amount of mechanical work equivalent to the food energy in one jelly doughnut? Assume the height of a single stair is 15 cm. stairs (c) If the human body is only 23% efficient in converting chemical energy to...
Q 11: One container holds 0.10 kg of water at 75 ∘C and is warmed to...
Q 11: One container holds 0.10 kg of water at 75 ∘C and is warmed to 95 ∘C by heating from contact with the other container. The other container, also holding 0.10 kg of water, cools from 35 ∘C to 15 ∘C. Specific heat of water is 4180 J/kg⋅∘C. Part A: Estimate the total change in entropy of two containers of water using the actual temperatures to determine the heat transferred to each container and the average temperatures to determine...
B. Consider a consumer choosing between two goods, food and gasoline. Suppose her monthly income is...
B. Consider a consumer choosing between two goods, food and gasoline. Suppose her monthly income is $1200 and average price of food per unit is $30. Price of gasoline per liter is $4. Suppose that the government levies a per unit consumption tax on gasoline. The tax rate is set to 20 percent. (a) Illustrate this change on a new graph with gas on the horizontal axis and explain if the consumer is better/worse off (indicate slope and intercepts) (b)...
A simple (non-cyclic) heat engine. Consider a cylinder containing an ideal gas under a piston, as...
A simple (non-cyclic) heat engine. Consider a cylinder containing an ideal gas under a piston, as shown in Figure below. After a weight m1 is removed from the piston, the gas expands, lifts the remaining weight m2, and the piston eventually settles at a new position h2. A. Assuming that the above process is carried out in a room whose temperature is maintained constant so that the initial and the final temperature of the gas is exactly the same, what...
You place your lunch leftovers in the refrigerator. Suppose the refrigerator needs to remove 1.4690E+4 J...
You place your lunch leftovers in the refrigerator. Suppose the refrigerator needs to remove 1.4690E+4 J of thermal energy from your lunch to cool it to the temperature of the inside of the refrigerator. In the meantime, this means the refrigerator produces 1.8957E+4 J of thermal energy that it expels into the kitchen as a result. What is the total work done by the compressor motor in the refrigerator? (Ignore any thermal loses due to friction in the motor.) What...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT