Have to use thermodynamics concept 5. When you blow on the back of your hand with your mouth wide-open, your breath feelswarm. But, if you partially close your mouth (like during whistling) and then blow on theback of your hand, your breath feels cool. Why?

AIR GETS TO COOL WHEN IT EXPANDS ( FROM THERMODYNAMICS LAWS)

Answered: u blow on the back of your hand

Engineering

Mechanical Engineering

u blow on the back of your hand

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter37: Air Distribution And Balance

Section: Chapter Questions

Problem 11RQ: Warm air heats a room better if distributed A. low in the room. B. high in the room. C. behind the...

See similar textbooks

Related questions

Q: Q3. We can determine the amount of heat transfer for any system undergoing any process using a…

A: Yes, we can determine the amount of heat transfer between system and surrounding for any system…

Q: 1.) Air undergoes an Isentropic process where it expands. It is initially at 900K then the…

A: Given:T1=900 KT2=300 K According to Bartleyby's policy we shall answer only one question at a time…

Q: The subject is Thermodynamics 1 1. Enumerate and explain the Four Fundamental Laws of…

A: Laws of thermodynamics- . Under thermodynamics, we study the relationship among heat , temperature,…

Q: A closed vessel of 0.1 m³ capacity contained air at 1 bar pressure and 27°C. Hydrogen was added and…

A: Given, Volume, V1=0.1m3Initial pressure,Pressure, P1=1 barTemperature, T1=27°C=300KFinal Pressure,…

Q: Check Your Understanding 39 39. For a constant pressure process, work done is a. zero b. P1*V1*In (…

A: Constant pressure process A thermodynamic process in which work is done on its environment at…

Q: A vertical cylinder with a freely floating piston contains 0.1 kg air at 1.2 bar and a small…

A: Answer: The rise in temperature of air 6 K or 6 ℃.

Q: Q4/Prove that the heat transfer in a constant pressure is Q = W, K К-1 Where Q: Heat transfer, W:…

A: Using 1st law of thermodynamics Q= delta U + W

Q: 14. When an individual is in water, the convective heat loss term is grea:ty increased. For water…

A: Given, Kc=16.5 kcal/m2hr°C. Water heat loss, Q˙=72kcal/hr Effective area, Ac=1.75m2 Temperature of…

Q: The enthalpy of a system is given by the equation H= U + PV where U is the internal energy, P=…

A: Write the given data with suitable variables: P=1.25 atmQ=45 J/sW=100 J/s∆V=35×105 m3/s

Q: In a polytropic process equation PV = C. If n = co, the process is termed as

A: In a polytropic process equation PVn=C, If n=∞, the process is termed as Answer: d) Constant Volume…

Q: 3. A piston-cylinder contains ideal CO (carbon monoxide, M=28.01 Ib/lbmol) that undergoes a process…

Q: QI 1. What are the advantage to know the intensive and extensive properties? 2. The data below to…

A: Note : As you have posted multiple question at a time. As per my guidelines, i am allowed to solve…

Q: Thermodynamics problem. If I have water vapor at 125◦C inside a piston, what pressure is necessary…

A: The pressure necessary to convert the vapor to liquid water without changing the temperature is…

Q: This application can be said a closed thermodynamic system Water heater Air compressor O

A: To select the correct option.

Q: Discuss the First and Second Lad of Thermodynamics, provide an example.

A: First law of thermodynamics is a version of law of conservation of energy. It states thats the sum…

Q: Given: Ammonia, P = 1.05 bar, T = -39.7°C Find: u (kJ/kg) Your Answer:

Q: A closed, rigid tonk contains o two-phose liquid-vopor mixture of Refrigerant-22 initially at -20°C…

Q: Explain Second Law of Thermodynamics and give your own example.

Q: Explain the statement: "the laws of thermodynamics can be stated as "you cannot win , you cannot…

A: the statement: "the laws of thermodynamics can be stated as "you cannot win , you cannot break even…

Q: K Q4/Prove that the heat transfer in a constant pressure is Q , W, K-1 Where Q Heat transfer, W:…

A: To prove: Q=(k/k-1)*W

Q: A Metal container with a mass of 2 kg and containing 2.30 kg of water is put it on a fire. Assume…

Q: Q3 (a) Explain the basic concept of thermodynamics.

A: Thermodynamics: It is branch of science which deals with the relation between the heat, work and…

Q: Arman is a Mechonical Engineering,designing a gas power cyde. In Arman's power cyde, air is…

A: Heat flow is the heat supplied for power generation or for the useful work of a machine. This can…

Q: please explain about thermodynamics and heat transfer in refrigeration"

A: Given: To explain about thermodynamics and heat transfer.

Q: Give at least five (5) application of thermodynamics in real life. Briefly explain each application…

Q: A series of thermodynamic processes is shown in the pV-daigram. In process ab, 150 J of heat are…

A: a) Internal energy change in process abdIn process a→b volume is constant dv=0we know that…

Q: Air is contained in a pistom final state. For each of the process to occur adiabatica process (use…

A: INTRODUCTION: A process in which no heat exchange between system and surrounding, it means no…

Q: An isolated system receives 9.95 Btu of paddle work isometrically. It contains O₂ at 49.91 psi,…

Q: Do you have a steam table file or pictures for my thermodynamics calculations?

Q: Which of the following is true with relative to basic thermodynamics?

A: Thermodynamics is a branch of science which deals with the study of energy interactions and its…

Q: a) Illustrate the second-law of thermodynamics based on the Kelvin-Planck Statement. Take the…

Q: this is rather a request nor a question, can you pls give an example of binary cycle in…

A: 1 2 3 4

Q: Derive the seven general property equation of the following thermodynamics processes: a. ISOTHERMAL…

A: given; Derive the seven general property equation of the following thermodynamics processes: a.…

Q: Ideal

A: Given data:m=10 lbR=40 ft lbf/lbm.R=40lbfftlbmR*1Btu778lbfft=.0514Btu/lbm.Rcp=.25 Btu/lbm.RP1=20…

Q: certain ideal gas X has molecular weight of 10 g/mol and specific heat ratio of initially, X has…

Q: what is the nonflow work

Q: Write first law of thermodynamics.

A: First law of thermodynamics state that energy can neither be created nor be destroyed it can only…

Q: A certain ideal gas Y has molecular weight of 25 g/mol and specific heat ratio of 3. Initially, Y…

A: For solution refer below images.

Q: Thermodynamics How does fluid friction and heat loss affect the efficiency of plant and explain…

A: Given Power plant To find Efficiency of the plant

Q: company buys gas at gage pressıre of 500 KPa and 2

A: option b is the answer.

Q: The first law of thermodynamics deals with While the zero law deals with.....

A: first law of Thermodynamics states that energy is neither created nor destroyed but it can be…

Q: Subject: thermodyanmics (Ideal Gas) one pound of air with an initial temperature pf 200F is allowed…

A: Given- Non-flow system that is a closed system, Ti = 200 F =366.483 K P1 = 90 psia = 620.53 kPa P2 =…

Q: In the polytropic process pvn Constant if n = 1 the process is termed as

Q: Briefly explain how to use steam table in thermodynamics

A: Steam tables are necessary for steam users in industry, just as a map is required when driving in a…

Q: A series of thermodynamic processes is shown in the pV-daigram. In process ab, 150 J of heat are…

A: Qab=150 JQbd=600 JFor process ab:Qab=150 J Wab=0 (constat volume process)From 1st law off…

Q: Q4/Prove that the heat transfer in a constant pressure is Q=, W, Where Q: Heat transfer, W: Work, K:…

Concept explainers

Forms of Energy

Energy is described as the capability to accomplish a task, like the ability to push a block by applying force on it. It is a quantitative property that is used to accomplish work on an object.

Question

Have to use thermodynamics concept

5. When you blow on the back of your hand with your mouth wide-open, your breath feels
warm. But, if you partially close your mouth (like during whistling) and then blow on the
back of your hand, your breath feels cool. Why?

Science that deals with the amount of energy transferred from one equilibrium state to another equilibrium state.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step by step

Solved in 2 steps with 1 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

Good day. I am trying to review for examinations and require assistance for these questions... Horse Power: An amount of work performed is 11,500ft-lb per seconds. How much hp is expended in this case? Piston Displacement: A four-cylinder aircraft engine has a total displacement of 275 cu. in. What is its cylinder bore or diameter if each of the four cylinders has a stroke of six inches? Compression Ratio: If there are 243 cubic inches of space in the cylinder when the piston is at the bottom and there are 27 cubic inches of space when the piston is at the top of the stroke. Find CR and V1 (Litre). **Would appreciate a detailed explanation. Thank you so much.
Why is it a good idea to bend you legs as you land on the ground after jumping down from a ledge (that is, say, a few feet higher than the ground)?
While discussing friction in matter: Technician A says that friction creates heat. Technician B says that friction only occurs with solids and is not present with liquids and gases. Who is correct? Technician A only Technician B only Both A and B Neither A nor B
Warm air heats a room better if distributed A. low in the room. B. high in the room. C. behind the furniture. D. under the curtains.
What is average velocity?
Why are gases and liquids considered fluids?
A force that acts at the right angle to the surface on which it acts is called Select one: Direct Force Straight Force Impact Force Indirect Force
Question 6 Which of the following statements regarding the formation and collapse of vapor bubbles in a liquid during cavitation is correct? Vapor bubbles are formed when the fluid pressure drops below the vapor pressure and collapses when the fluid pressure goes above the bubble pressure Vapor bubbles are formed when the fluid pressure drops below the vapor pressure and collapses when the fluid pressure goes below the bubbie pressure Vapor bubbles are formed when the fluid pressure goes above the vapor pressure and collapses when the fluid pressure goes below the bubble pressure d. Vapor bubbles are formed when the fluid pressure goes above the vapor pressure and collapses when the fluid pressure goes above the bubble pressure
Question 6 Which of the following statements regarding the formation and collapse of vapor bubbles in a liquid during cavitation is correct? Oa Vapor bubbles are formed when the tluid pressure drops below the vapor pressure and collapses when the fluid pressure goes above the bubble pressure Ob Vapor bubbles are formed when the fluid pressure drops below the vapor pressure and collapses when the fluid pressure goes below the bubble pressure Vapor bubbles are formed when the fluid pressure goes above the vapor pressure and collapses when the fluid pressure goes below the bubble pressure d Vapor bubbles are formed when the fluid pressure goes above the vapor pressure and collapses when the fluid pressure goes above the bubble pressure
#2 i neeed help
Why is the answer in the question different from that of the solution?
.Q21 The forces do not cause rotation