Question

Seriously is there anybody on that could help me? I'm in dire need of some physics guidance right now

Answer 1

first your question, then we will see. . .

Answer 2

an iron horse shoe having a mass of 300g is heated up to 1200 degrees celcius in order to shape it to fit a horses hoof. if this is dropped into 8kg of water at a beginning tempature of 20 degrees celcius what will the final tempature of the water be

Answer 3

mmm thermodynamics is not my strong area

Answer 4

at this point anything will help

Answer 5

I am here and I m ready to help thats that..

now lets begin.. i have two words for you. CALORIMETRY PRINCIPLE.. which is nothing but energy convservation!!

Answer 6

yeah we did a lab in class using a calorimeter but im still completely baffled on the homework

Answer 7

Its a direct application of your lab.. i guess u didn't understand what you did then :P

suppose the water and the shoe finally come to some temperature t

then can u find how much energy is lost by the shoe? due to its temperature decrease from 1200 C to t degree C ?

Answer 8

i set up an equation and i came out with an answer but im really not sure if the answer is right. could you do the problem and compare answers?

Answer 9

show me working here.. wll ya? ll check it..

Answer 10

so i have (8kg)(4.187)(1180)=300x
and x is tempature
i got 131.75

Answer 11

no thats horribly wrong :O
do this one step at a time

first find out the energy lost by the shoe, due to its temperature decrease from 1200 degree C to t degree C

Answer 12

1180

Answer 13

no..

Answer 14

right?

Answer 15

so how do i do that?

Answer 16

how can u get a number? when u donno what t, the final temperature is?

Answer 17

when an objects temperature changes from t1 to t2.. what is the formula for heat energy lost or gained?

Answer 18

idk my teacher did something with subtracting two temps... idk im completely lost

Answer 19

is it q=mCp(delta T)

Answer 20

The energy lost is always dependent on three things

a) the temperature difference, b) Mass of the material, c) the time of material.

thats exactly the formula!

Answer 21

so now using that.. can u answer my question?

Answer 22

i dont know whats what to plug in

Answer 23

m = mass
Cp = specific heat capacity of that material
delta t = final temp minus initial temp!

Answer 24

mass of horse shoe or mass of water?

Answer 25

My question was how much energy the Shoe is losing right? so all those must be of the shoe right?

Answer 26

yeah. and how do i know what the specific heat capacity of the shoe is? my teacher gets all of his out of a book

Answer 27

its made up of iron, so look up for specific heat of iron

Answer 28

.450 is what i found

Answer 29

Yup that is right!

Answer 30

so i did the equation and got 159300 is that right

Answer 31

but its 0.45 KJ/k/kg = 0.45 times 1000 J/k/kg (cause remember Kilo = 1000)

and no.. show me step by step what you do!

Answer 32

(300)(.45)(1200-20)

Answer 33

First you have to convert everything to S.I
meaning all masses must be in kilograms specific heat in J/K/kg

so mass is given as 300 g.. you can't use directly

and second of all, the final temperature is NOT 20..

do you think when u drop that horse shoe, the final temperature will be 20 degree celcius.. we have to calculate that

Answer 34

ahhhhhhhh im so behind schedule lol if i could just get answers thatd be great lol sorry :( id love to learn it all but i dont have the time right now

Answer 35

i gotta go but thank you so much for your help!

Answer 36

Yes.. you better do some reviewing first.. I will not give out the answer, just cause u have to finish your H.W. :P.. its called tough love :D