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How many joules of heat are required to change the heat of iron?
The specific heat of iron metal is 0.450 J/g-K. How many joules of heat are necessary to raise the temperature of a 10.0 gram piece of iron from 33 C to 55 C?
Please help with this chem question!!
Answer: Heat energy required = [mass] * [specific heat] * [change in temperature]
You just need to double check that you are being consistent with your units.
mass = 10 g
specific heat = 0.450 J/g-K { = 0.450 J/g-°C since the kelvin and celcius degree are the same size}
change in temperature = (55°C - 33°C) = 22°C
Heat required = (10 g * 0.450 J/g-°C * 22°C) = 99.0 J
Category: Other - Science
The Final Stretch to Iowa | Dec. 23-29
THE NEWS With polls showing the outcome of the Jan. 3 Iowa caucuses up in the air, the top Democratic presidential candidates sharpened their appeals. BEHIND THE NEWS An extremely tight race among Hillary Rodham Clinton, Barack Obama and John Edwards put the focus on the many likely caucusgoers who were undecided. Mrs. Clinton said she alone had
The Heat (2013) - IMDb
Directed by Paul Feig. With Sandra Bullock, Melissa McCarthy, Demián Bichir, Michael McDonald. Uptight FBI special agent Sarah Ashburn is paired with testy ...
The Heat Movie Tickets, Reviews, and Photos - Fandango.com
The Heat, The Heat movie, The Heat plot, The Heat showtimes, trailers, cast and crew, photos, movie reviews, fandango.
How much more energy is used to heat an apt using just auxillery heat strips versus using the whole system?
I have a heat system that is electric which has the heat strips and a heat pump on the outside but due to coil issues right now Im fully dependent on the heat strips. I wondering what impact does that have on the electric bill.
Answer: The difference is fairly huge. Your heat strips rely on electric resistance heat, which is to say that you have to buy 1 kilowatt of electricity of power to get 1 kilowatt of heat (approximately 3,400 btu). Conversely, a typical air source heat pump which uses 1 kilowatt of power will provide between 3 and 4 kilowatts of heat (10,200 to 13,600 btu) on a 10 degree C day.
Spend money to repair the heat pump - it's money well spent.
Category: Maintenance & Repairs
Paul Feig Talks THE HEAT, Doing an Unrated Cut on Blu-ray, New ...
Paul Feig Talks THE HEAT, Doing an Unrated Cut on Blu-ray, Developing New TV projects, His James Bond Female Spy Comedy , and More.
How much heat does it take to bring a 3.4 kg iron skillet from 20 degrees to 130 degrees?
If the heat is supplied by a stove burner at the rate of 2.0 kW, how long will it take to heat the pan?
Answer: U = c·m·∆T
U is energy in Joules to heat the material by ∆T
c is specific heat of the material in J/kg·K
m is mass in kg, ∆T is temperature change in ºC
specific heat of Iron is 452 J/kgC
U = 452 J/kgC x 3.4 kg x 110ºC = 169000 joules
This assumes no heat loss to the air, which is not possible.
2 kW = 2000 watts = 2000 joules per second
169000 joules / 2000 joules per second = 84.5 seconds
.
Category: Physics
How to retain the heat energy in hot water tank of Solar Water Heater in Rainy season?
How to retain the heat energy in hot water tank of Solar Water Heater in Rainy season?
Is there any method so that, a heat energy storing material can be kept inside the tank which will store the heat energy for the whole day. And if temperature falls down in rainy season, it will add some heat into water. This would help to maintain the warm temperature of water. Please, answer if you know such technology. Thank You.
Answer: paint white heat resistant , heat reflective paint from inside and outside.. cover the tank with something fluffy like gunny bags or wool or clothes .. air shud be trapped air is a bad cinductoe of heat !! if u can afford it cover it wid white thermocol..
Category: Green Living
With New Poll Results, Candidates Scramble for Edge in Caucuses
The presidential candidates spent the last Sunday before the Iowa caucuses attending church services, staging big rallies and sniping at one another as new polls suggested tightening races in both the Democratic and Republican fields. With three Democrats scrambling for the lead in Iowa heading into the voting on Thursday, the candidates tried to - Presidential hopefuls heighten attacks on each other over final weekend before Iowa caucuses; McClatchy/MSNBC poll shows tight races, with Democratic hopefuls Barack Obama, Hillary Clinton and John Edwards in dead heat among likely caucus-goers, and Republican contenders Mike Huckabee and Mitt Romney tied, while others lag; photo (M) - By PATRICK HEALY and JULIE BOSMAN; David D. Kirkpatrick, Cate Doty, Michael Cooper and Michael Luo contributed reporting from Iowa, and Marc Santora from New Hampshire.
'The Heat' Is a Buddy Movie Without Any Guys - NYTimes.com
1 day ago ... The Heat,” directed by Paul Feig, is a cop-buddy movie, but the buddies are women, Sandra Bullock and Melissa McCarthy.
Guess Which Critic Wrote The New York Times's Review of The Heat
Today's Weekend Arts section of The New York Times had a pretty tepid review of the Melissa McCarthy/Sandra Bullock buddy-cop movie The Heat as its cover story. But they forgot to add a byline! Can you guess which noted ...
Ray Allen exercises player option to return to Heat next season | The ...
Ray Allen will seek the third title of his career with the Heat next year. (Nathaniel S. Butler/NBAE via Getty Images). The Heat announced Friday that guard Ray Allen has exercised his player option and will remain with Miami ...
How does heat and work increase the internal energy of a system?
How does heat and work increase the internal energy of a system?
Answer: internal energy is kinetic energy + potential energy.
doing work on an object enables the molecules to move faster, increasing KE.
It also enables the molecules to move further apart, increasing PE
thus, increasing work done, will increase internal energy.
Similarly increasing temperature and supplying heat will also cause the molecules to move faster and further apart, having the same effect.
Category: Physics
How can the specific heat be characterized for a material that heats up quickly?
How can the specific heat be characterized for a material that heats up quickly?
a. It has a low specific heat.
b. It has a high specific heat.
c. It is impossible to make this judgment.
Logically thinking, if it heats up quickly, it probably also cools down quickly, which means it has a low specific heat.
However, I have never found physics to be logical. So.
Please help?
I really need the answer to the this question. Itll make the rest of the questions in my assignment so much easier.
Answer: b. It has a high specific heat.
Think of it as heat conductivity. If it is high it is a good conductor of heat. Fiberglass insulation and air ar NOT good conductors of heat.
Category: Physics
Why would the heat stop working in half the rooms in my house?
I have electric heat but no vents. I was told it heats by hot water going through the ceiling.
Oh yes, there is a thermostat in every room.
Oh, there is a thermostat in every room.
Answer: Is your house more than one zone, in other words do you have 2 thermostats or 1 that control all the heat. If any of that water is going through a dead space, or without being insulated the probability of it freezing is very real.Unless air got into the system somehow that is another possibility. The third scenario is you are losing water someplace, my suggestion is to start at the heat source and follow it from there.
Category: Maintenance & Repairs
The Heat (film) - Wikipedia, the free encyclopedia
The Heat is a 2013 American action-comedy film written by Katie Dippold and directed by Paul Feig. The plot centers on FBI Special Agent Sarah Ashburn and ...
ARMCHAIR TRAVELER
Arabian Sands By Wilfred Thesiger Penguin, 347 pages, $15 paperback The Marsh Arabs By Wilfred Thesiger Penguin, 233 pages, $15 paperback They dont make Englishmen like Wilfred Thesiger anymore, and perhaps thats for the best. Long before his death in 2003, at age 93, this virile Etonian who boxed for Oxford and served in the Sudan Political - Richard Woodward reviews book Arabian Sands by Wilfred Thesiger; photos (M) - By RICHARD B. WOODWARD
How long does it take for heat tape to thaw frozen pipes?
Our heat tape got unplugged and now our pipes are frozen. Does anyone know how long it takes for the heat tape to thaw out frozen pipes?
The heat tape came unplugged, and it has now been plugged back in for about 5 hours now and still nothing. Im beginning to wonder if the heat tape "died" which is why Im trying to figure out how long it takes to thaw the frozen pipes.
Answer: It will take days. Heat tape is for preventing freezing, not thawing out frozen pipes. It takes a lot of heat to melt ice.
Category: Maintenance & Repairs
how does emergency heat work on my cental unit?
my heat went out on my centeal a/c and heating unit. what is the emergency heat for and how does it work?
Answer: If you have emergency heat it is usually electric coils in the duct work, just because your t-stat says eheat it doesnt me you have it
Category: Maintenance & Repairs
'The Heat' gets a killer Mondo poster | Inside Movies | EW.com
Now this is how you bring The Heat. (As opposed to this. Good grief.) This morning, Mondo revealed exclusively to EW their righteous treatment of the Sandra Bullock/Melissa McCarthy buddy cop comedy.
The Heat | Official Movie Site | In Theaters June 28
Official site for the new comedy movie starring Sandra Bullock and Melissa McCarthy. From the Director of Bridesmaids Paul Feig.
What is the difference between specific heat value and specific heat capacity?
Specific heat capacity is the quantity of energy required to raise the temperature, correct?
Specific heat value defined as (J/(C x g) )
So if asked to calculate the energy change of the surroundings in an experiment, you would use the formula above?? (J/C x g) )
If that is correct, then what do you do in order to find the specific heat of a metal? Is it a different formula? Did I do everything wrong?
Answer: Specific heat capacity refers to 1 kg of a substance, i.e. energy needed to raise a temperature of 1kg substance by 1 degree Celsius. (energy = mass x specific heat capacity x temperature change).
While, heat capacity is simply energy needed to raise a temperature by 1 degree Celsius, irrespective of how much substance there is. (energy = heat capacity x temperature change).
As to when you use which formula depends on the wording of the question. Too often it will be the energy = mass x specific heat capacity x temperature change, for example when a certain amount of substance absorb or emits energy! In this later case, energy will be lost to the surrounding or it could be absorbed by certain amount of water in a beaker!
Another clue is that the question may give you the value of specific heat capacity of a substance - in which case you're expected to use it in your calculation.
Sorry for not being too precise!
Category: Chemistry
How much heat energy is required to raise the temperature of 50g of water by 10 degrees celcius?
Heat energy in calories please.
Answer: Heat= mass X specific heat X change in temperature, specific heat of water =1cal/g
Heat= 50g x 1 x 10
Heat= 500cal
Category: Other - Science
PEG BRACKEN | B. 1918
The men who ruled the world in the late 1950s, or at least six of the men who ruled publishing, rejected Peg Brackens manuscript, The I Hate to Cook Book. It would never sell, they told her, because women regard cooking as sacred. It took a female editor at Harcourt Brace to look at the hundreds of easy-to-follow recipes wittily pitched at - Alex Witchel article pays tribute to late Peg Bracken, whose I Hate to Cook Book took anxiety out of cooking for countless American women after its publication in 1960; recipes; photo (M) - By ALEX WITCHEL
N.B.A. ROUNDUP; Late Efforts From Kidd And Carter Fuel Nets
Vince Carter scored 8 of his 23 points in the final four minutes, Jason Kidd added 11 of his 17 in the fourth quarter, and the Nets beat the host Milwaukee Bucks, 97-95, on Saturday night. Richard Jefferson had 19 for the Nets, who have won 4 of 5. Kidd finished with 15 assists but 6 turnovers. Michael Redd led Milwaukee with 35 points. Mo Williams - New Jersey Nets defeat Milwaukee Bucks, 97-95; other NBA results noted (S) - By THE ASSOCIATED PRESS
DINING; Standouts Among the Years Best
ITS the end of the year, so lets take a long view. In the past 10 years, the New Jersey section has reviewed nearly 500 restaurants. Of those, 209, or 42 percent, were given one of our three highest ratings: extraordinary (2 restaurants), excellent (44) or very good (163). So what kind of year was 2007? Pretty typical, it turns out. Of the 46 - David Corcoran roundup of best New Jersey restaurants reviewed this year; photos (M) - By DAVID CORCORAN
WINDOW SHOPPING; Open to the Elements
A DESIGN-SAVVY friend called. She had an appointment in the just-opened sales office of the Metal Shutter Houses, an 11-story condominium designed by the Japanese architect Shigeru Ban, in what is now West Chelsea. Im a big fan of Mr. Bans work. I love the way he uses ordinary materials to create sublime spaces. I have dreamed about living in the - Window Shopping column on Metal Shutter Houses, 11-story luxury condominium building under development in West Chelsea section of Manhattan by Jeff Spiritos, president of HEEA Development LLC; design is by Japanese architect Shigeru Ban; photo (M) - By SUZANNE SLESIN
How to heat a 170 square meters open room without central heating?
I would like to know how can I heat up to 22 Degrees room area of 170 square meters. I have tried with 25 kw wood stove and it didnt work. I have even tried the wood stove with the blower instilled inside the stove, but still couldnt heat it up. Any suggestions.
Answer: i heat my 100 square meters open room with a cockle stove of 7 kw with an ancillary heating , but my walls are done of hollow bricks and a thick layer of clay. so my additional floor heating is never working.
perhaps you must isolate your walls or look for a thick iron stove and a long iron stove pipe. that works a lot.
Category: Physics
The Heat - Inside Movies - Entertainment Weekly
Two brand-new action comedies, The Heat and White House Down, will try to unseat Monsters University from the top spot at the box office this week, but that could be a formidable challenge.
How to find out why our heat is not heating?
Our heat seem to have stopped heating in our house. (Central heat & air) This is the first time we have ever had a problem with the heat, its always the AC! The only thing I could think to check was the pilot light under the water tank... Are there other common cause I can check?
Answer: If your central heat is of the forced air variety, you should be able to hear the blower engage a bit after the burner lights. If the blower does not run, often the V belt has broken or slipped from the pulley. A squealing noise often precedes V belt failure. Other less common problems include a worn blower motor, various valves and relays.
If your heat is of the hot water variety, gas and burner controls, and circulation pumps could be the culprit. A heating tradesman should be consulted.
Category: Maintenance & Repairs
The Heat - Rotten Tomatoes
Review: The Heat is predictable, but Melissa McCarthy is reliably funny and Sandra Bullock proves a capable foil.
Movie reviews: “The Heat,” “White House Down” | WGN-TV
Dean Richards reviews "The Heat" and "White House Down."
How much heat does it take to bring a 3.4 kg iron skillet from 20 degrees to 130 degrees?
If the heat is supplied by a stove burner at the rate of 2.0 kW, how long will it take to heat the pan?
Answer: The specific heat of a material tells you how much heat is necessary to raise the temperature of a material. In the absence of a phase change (melting/freezing, boiling/condensing, which we don't have here),
Cp * delta T * m = delta Q
where Cp is the specific heat capacity of the material, delta T is the change in temperature of the material, m is the mass of the material, and delta Q is the total energy going into and out of the material.
Your problem statement gives you the mass, and it gives you the change in temperature (you need units, but I assume those were supposed to be degrees Celsius). It doesn't give you the energy going into the skillet, but it does give you the power going into the skillet. Power is just energy divided by time, so we could write
Cp * delta T * m = (Q/t) * t
Note that when we do this, we're neglecting any other energy flowing in the system - we're assuming that the pan isn't losing energy to the environment, it's only gaining energy from the stove burner.
So, we've got delta T, m, Q/t, and we want to solve for t. The only thing we need is the specific heat of iron. Wikipedia lists it as 0.450 J/(g * K). Now you can solve for t, plug those values in, and get the solution. But remember, in reality, some of the energy going into the skillet will be transferred to the environment, so the real answer will be somewhat longer than what you calculate (it becomes a much more complicated problem when you have to deal with convection, because the heat flow is a function of temperature).
I hope that helps!
Category: Engineering
What part of a heat pump furnace create 3x the electricity if it went wrong?
Heating bills have triple - what could be wrong? Heat pump replaced recently - what else could be problem?
Answer: Sounds like the heat pump is not running and it's using the electric auxillary heat strips.
Category: Maintenance & Repairs
Beat the heat with trees and fans, even in Florida : TreeHugger
A Floridian tipster tells how he lives and works without air conditioning.
"The Heat" Official Trailer - YouTube
Apr 18, 2013 ... Uptight FBI Special Agent Sarah Ashburn (Sandra Bullock) and foul-mouthed Boston cop Shannon Mullins (Melissa McCarthy) couldn't be ...
How many heat levels are there in NFS Undercover and what are the car combonations?
How many heat levels are there in Need For Speed Undercover?
What are the police car types combinations? Example: in heat 3 there is a mix of Undercover Cruisers (heat 2) cops and Civic Cruisers.
Answer: There are 6 heat levels.
1= Crown vic. look alikes.
2= 08 Mustangs
3= 09 Nissan GTR's (with helicopter)
4= 08 Porsche 911 Turbo undercover (with helicopter)
5= K9 SUV units (with helicopter)
6= Porshe and K9 units (with helicopter)
Category: Video & Online Games
SHAKEN & STIRRED; Ginger Buzz
IT is the time of year when sweet things come a-creeping. Fruitcakes, I mean. Gingerbread houses. Funny little cookies. Cards from distant relations emblazoned with photographs of children dressed in sweaters, and sometimes-tragic dogs dressed in sweaters. That sort of thing. As in life, as in drinking: cocktails, like sentiments, tend to undergo - Shaken & Stirred column on gingerbread apple cocktail adapted from P*ong restaurant in Greenwich Village, Manhattan; recipe; photo (M) - By JONATHAN MILES
Video Reviews of 'The Heat,' 'White House Down' and 'I'm So Excited!'
Times critics on “White House Down,” “The Heat” and “I'm So Excited!”
DINING | IN RETROSPECT; How Sushi Chased Beef Wellington
CHIPOTLE, huitlacoche, galangal, Kaffir lime, cilantro aioli, ciabata, chimichurri, bok choy, arugula, tat soi, yuzu, mesclun, panna cotta, ponzu, lemon grass -- these and dozens of other words were mostly unknown 30 years ago when I began reviewing restaurants for the Connecticut section of this newspaper. At that time, there were so few white - Patricia Brooks on changes in cuisine at Connecticut restaurants since she began reviewing them 30 years ago; photos (M) - By PATRICIA BROOKS
Pause in Winters Chill Puts Spring in Many Steps
Circumambulating the city on a springlike Saturday afternoon: New Yorkers and out-of-towners alike smiling in the sunlit warmth. Birds singing in Central Park. Couples kissing without hats or scarves. Sunglasses coming out as shoppers left stores. Despite New Years being barely two days away, the streets were free of snow and black ice. Sidewalks - New Yorkers enjoy respite of springlike December day; photo (M) - By ANTHONY RAMIREZ
'The Heat' Is Absolutely Revolutionary, For Being Mostly Ordinary ...
14 hours ago ... The Heat is rare for being a buddy-cop movie about women, but the reason to see it? It's really funny.