On a February night, energy leaves a house by several energy leaks, including 1.50×103W by conduction through the ceiling, 450W by infiltration (airflow) around the windows, 140W by conduction through the basement wall above the foundation sill, and 40.0W by conduction through the plywood door to the attic. To produce the biggest saving in heating bills, which one of these energy transfers should be reduced first? Explain how you decide.

Q: A certain coal-fired power plant has a rated power capacity of P = 950 MW. The output of this plant…

A:

Q: 7. Determine the work done

A: Work Done-When energy transfer from one form to another it termed as work…

Q: You happen to leave the door to your 27.9 ft³ refrigerator (rated at 458 W) open long enough that…

A:

Q: A system's "entropy" is (a) the amount of work the system can do. (b) the amount of microscopic work…

A: Since entropy is a measure of randomness, so when a system has large number of microscopic quantity…

Q: How much energy would you consume daily if you kept a lightbulb of 20 watts on all day long?

A: A lightbulb is rated as 20 Watt which is indicating the power of the bulb.  P = E/t  Power is…

Q: Find the average specific heat of the liquid in this temperature range. Assume that negligible heat…

A:

Q: (c) A farm house in a remote area requires on average 280 kWh per week. The average insolation time…

A: (1) Block Diagram of the PV System:                     PV Modules (32 modules)…

Q: Suppose a woman does 600 J of work and -9400 J of heat transfer occurs into the environment in the…

A: Work, W = 600 JHeat, Q = -9400 JEfficiency, Eff = ?

Q: Question 6 ( A closed system having a weight of 85 lbs. has an initial velocity of 30 ft/s. Its…

A: Solution:-Given thatmass (m)=85 lbsinitial velocity (v1)=30 ft/sfinal velocity (v2)=80 ft/schange in…

Q: The refrigerator in your kitchen does 490 J of work to remove 95 J of heat from its interior. How…

A: We have to fine the heat that the refrigerator exhausts into the kitchen. We know the work done by…

Q: electric hot plate raises its own internal energy and the internal energy of a cup of water by 15000…

A: given Q = -2900 J ΔU = 15000 J

Q: P (10º N/m³)| 2.6 A 2.0 B 1.0 0.6 1.0 4.0 V (10° m³) Figure 15.42 15. What is the net work output of…

A: Given data: The volume at A and D is VA=VD=1x10-3 m3. The volume at B and C is VB=VC=4x10-3 m3. The…

Q: 1. Rick spends four hours researching on the internet and does 1090 J of work. In the process, his…

A: Given data The work done by rick is given as W = 1090 J. The decrease in internal energy is given…

Q: A system absorbs 413 J of heat and does 177 J of work on its surroundings. What is the change in the…

A:

Q: Before the quarantine, 23 candidates for passing PHY136 took the final exam, all in the same room.…

A: Given:No. of candidates=23Power output=185WInitial temperature,Ti=66 oF…

Q: A certain coal-fired power plant has a rated power capacity of P = 850 MW. The output of this plant…

A: Given that :- Power capacity , P=850 MW  Output , W=0.26Q11

Q: . You find yourself in the middle of a blackout with no electricity. You want to have a cup of tea,…

A: volume of water (V) = 200 cm3density of water = 1 gcm3∆h = 32 cm = 0.32 m Initial temperature of…

Q: My computer uses 15 W, if I run it for 3 hours how many Joules have I used?

A: Given:         Power used by computer = 150W       Time it's running = 3 hrs= 3× 60 × 60 sec…

Q: me that Q₁ = -15.0 J and Q2 = -80.0 J in (Figure 1). help with math skills, you may want to review:…

A:

Q: How much kinetic energy would I have to generate by rubbing my hands together to light my hands on…

A: Rubbing your hands together generates heat due to the friction between them. However, it is unlikely…

Q: Over the course of a day, 4.0 kg of water evaporates from the leaves of a corn plant. a) How much…

A:

Q: On a trip, you notice that a 5.30-kg bag of ice lasts an average of one day in your cooler. What is…

A: The objective of this question is to calculate the average power in watts entering the ice if it…

Q: The urban heat island effect is often strongest at night when temperatures would typically drop.…

A: The urban heat island effect is often strongest at night when temperatures would typically drop.…

Human Metabolism

Being described as the most complicated machine ever encountered by humans, the human body and the cell metabolism is nothing less than a wonder. Metabolism is the set of life-sustaining chemical reactions within organisms.