Homework Answers
Wind chill is the effect of lowering of body temperature because of passing of low temperature air close to the body.
It can be understood in terms of heat transfer as the
rate of convection depends on both the difference in temperature between the surface and the fluid surrounding it and the velocity of that fluid with respect to the surface. As convection from a warm surface heats the air around it, an insulating boundary layer of warm air forms against the surface. Moving air disrupts this boundary layer, allowing for cooler air to replace the warm air against the surface. The faster the wind speed, the more readily the surface cools. This is the reason why our body feels cool in the winter when wind flows.
Like
Add Answer to:
thermodynamic class
4. In the wintertime, it feels much colder outside when the wind is blowing...
4. You will experience a significant convection cooling effect when you extend your arm outside t...
4. You will experience a significant convection cooling effect when you extend your arm outside the window in a moving vehicle or into a flowing water stream. Assume that the surface of your hands is at a temperature of 32 'C. You dip one of your hands in a stream of cold water at 10 C, and another in a stream of cold air. The convective coefficient for the water stream is 45 Wm2K I, while for the air stream...
please show me the whole work for question 4) and 5),thank you so much An insulating...
please show me the whole work for question 4) and 5),thank you
so much
An insulating wall is composed of 10 cm of a material having an thermal conductivity of 5 W/m.K, and an unknown thickness of cork, which has a thermal conductivity of 0.045 W/m.K. How thick must the cork be if the heat losses through the wall are to be less than 10W/m2 when the inside temperature is 20degree C and it's -20degree C outside? Water flows through...
Exercise 5: I was changing 34 around too much that I just made it a separate...
Exercise 5: I was changing 34 around too much that I just made it a separate exercise. Suppose 310. grams of ethanol (ethyl alcohol) is in an aluminum cup of 90.0 grams. Both of these are at 30.0C. A mass m of ice at - 8.5C is taken from a freezer and added to the alcohol in the cup. The final temperature of all the components is 18.0C. Assuming no heat was lost from the system, calculate the mass m...
How to do this? 4-5 Applications Name We'll begin this assignment by looking at the savings...
How to do this?
4-5 Applications Name We'll begin this assignment by looking at the savings plan for Joe, a 10-year-old with a seady job making $30.000 a year, with an annual raise of 49. Looking ahead to the future, Joe commits to saving 125 of his earnings every year. He chooses a fixed Tund investment that returns 9 annually. The following graph shows Joe's earnings, the amount of money he spends, and the amount of money that is generated...
summarizr the followung info and write them in your own words and break them into different...
summarizr the followung info and write them in your own words and break them into different key points. 6.5 Metering Chamber: 6.5.1 The minimum size of the metering box is governed by the metering area required to obtain a representative test area for the specimen (see 7.2) and for maintenance of reasonable test accuracy. For example, for specimens incorporating air spaces or stud spaces, the metering area shall span an integral number of spaces (see 5.5). The depth of...
No economic disaster, but we are stuck in low gear Prime Minister Scott Morrison's claim that...
No economic disaster, but we are stuck in low gear Prime Minister Scott Morrison's claim that this week's soft economic growth figures were "no surprise" is itself a bit, well, surprising. If the government had such a strong inkling the Australian economy would endure a weak June quarter, why did it only really start softening up the public this week, in the days leading up to the national accounts? Why didn't the April budget build more of this anticipated softness...
summatize the following info and break them into differeng key points. write them in yojr own...
summatize the following info and break them into differeng key points. write them in yojr own words
apartus
6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...
21C.1(a) The reaction of propylxanthate ion in acetic acid buffer solutions has the mechanism A− +H+→P....
21C.1(a) The reaction of propylxanthate ion in acetic acid buffer
solutions
has the mechanism A− +H+→P. Near 30 °C the rate constant is given
by the
empirical expression kr=(2.05×1013) e−(8681K)/T dm3mol−1 s−1.
Evaluate the
energy and entropy of activation at 30 °C.
21C.1(b) The reaction A− +H+→P has a rate constant given by the
empirical
expression kr=(6.92×1012)e−(5925K)/T dm3mol−1 s−1. Evaluate the
energy and
entropy of activation at 25 °C.
Please explain why they calculated H=E-RT like that
like why is...
John Beckett enjoys vegetables, so much so that he has given up his full-time job as...
John Beckett enjoys vegetables, so much so that he has given up his full-time job as a lawyer to concentrate on growing and marketing organic vegetables. He started growing vegetables 20 years ago in his back garden and eventually became fully self-sufficient in supplying vegetables for the family. Partly bored with his legal job and tempted by an attractive severance package, John decided he would try to establish his own vegetable supply business. Eighteen months ago he looked around for...
Beckett Organics John Beckett enjoys vegetables, so much so that he has given up his full-time...
Beckett Organics John Beckett enjoys vegetables, so much so that he has given up his full-time job as a lawyer to concentrate on growing and marketing organic vegetables. He started growing vegetables 20 years ago in his back garden and eventually became fully self-sufficient in supplying vegetables for the family. Partly bored with his legal job and tempted by an attractive severance package, John decided he would try to establish his own vegetable supply business. Eighteen months ago he looked...
4. You will experience a significant convection cooling effect when you extend your arm outside the window in a moving vehicle or into a flowing water stream. Assume that the surface of your hands is at a temperature of 32 'C. You dip one of your hands in a stream of cold water at 10 C, and another in a stream of cold air. The convective coefficient for the water stream is 45 Wm2K I, while for the air stream...
please show me the whole work for question 4) and 5),thank you
so much
An insulating wall is composed of 10 cm of a material having an thermal conductivity of 5 W/m.K, and an unknown thickness of cork, which has a thermal conductivity of 0.045 W/m.K. How thick must the cork be if the heat losses through the wall are to be less than 10W/m2 when the inside temperature is 20degree C and it's -20degree C outside? Water flows through...
Exercise 5: I was changing 34 around too much that I just made it a separate exercise. Suppose 310. grams of ethanol (ethyl alcohol) is in an aluminum cup of 90.0 grams. Both of these are at 30.0C. A mass m of ice at - 8.5C is taken from a freezer and added to the alcohol in the cup. The final temperature of all the components is 18.0C. Assuming no heat was lost from the system, calculate the mass m...
How to do this?
4-5 Applications Name We'll begin this assignment by looking at the savings plan for Joe, a 10-year-old with a seady job making $30.000 a year, with an annual raise of 49. Looking ahead to the future, Joe commits to saving 125 of his earnings every year. He chooses a fixed Tund investment that returns 9 annually. The following graph shows Joe's earnings, the amount of money he spends, and the amount of money that is generated...
summatize the following info and break them into differeng key points. write them in yojr own words
apartus
6.1 Introduction—The design of a successful hot box appa- ratus is influenced by many factors. Before beginning the design of an apparatus meeting this standard, the designer shall review the discussion on the limitations and accuracy, Section 13, discussions of the energy flows in a hot box, Annex A2, the metering box wall loss flow, Annex A3, and flanking loss, Annex...
21C.1(a) The reaction of propylxanthate ion in acetic acid buffer
solutions
has the mechanism A− +H+→P. Near 30 °C the rate constant is given
by the
empirical expression kr=(2.05×1013) e−(8681K)/T dm3mol−1 s−1.
Evaluate the
energy and entropy of activation at 30 °C.
21C.1(b) The reaction A− +H+→P has a rate constant given by the
empirical
expression kr=(6.92×1012)e−(5925K)/T dm3mol−1 s−1. Evaluate the
energy and
entropy of activation at 25 °C.
Please explain why they calculated H=E-RT like that
like why is...
Most questions answered within 3 hours.
-
Batteries play an important role in our everyday lives. From
making many devices mobile, to allowing...
asked 5 minutes ago -
It is possible to iterate through an array quickly and easily
using a loop?
asked 12 minutes ago -
Determine the pHpH of an HFHF solution of each of the following
concentrations. The KAKA value...
asked 8 minutes ago -
Two point charges of 7.0mL are initially 11.5m apart. What is
the change in potential energy...
asked 9 minutes ago -
Please write as a short answer
You have heartburn and a two hour working session on...
asked 13 minutes ago -
Please solve with excel and mention the excel function.
Thanks
Kevin deposits $10,000 in a savings...
asked 15 minutes ago -
Which Special Journal would the following transaction be
journalized in?
Sold merchandise on account to Customer...
asked 27 minutes ago -
Assuming 100% dissociation, calculate the freezing point (?fTf)
and boiling point (?bTb) of 1.45 ? K3PO4(aq)1.45...
asked 29 minutes ago -
An inflated helium balloon with a volume of 0.35L at
sea level (1.0 atm) was allowed...
asked 31 minutes ago -
Python 3.0 Please
Write a function that takes, as arguments, a binary string, a
list of...
asked 59 minutes ago -
(a) Calculate the momentum of a 2150 kg elephant charging a
hunter at a speed of...
asked 47 minutes ago -
all the following is an example of a fixed cost except: any cost
that changes in...
asked 49 minutes ago