Lab 10 Execution

I tried Question 10 again this morning and got it correct. I must have misspelled something or forgot something. Thanks!

what are the answers for the second part of questions 7

or how do you compute them?

for the Value of deltaQ(correct) i used sqrt((Deltam/m)^2+(DeltadeltaT/deltaT)^2)*Q
for deltadeltaT i used sqrt((DeltaT_i)^2+(DeltaT_f)^2) and for delta T i used Tf-Ti and for Q i added all the Q's

My answer is still coming up wrong. for m do i have to add all the masses together and use .2 for deltam?

What am i doing wrong?

I am getting 7 wrong too

plz help

how do you do the ratio for #12?

how do u do the upper part on 7?????????

For Question 7 all it is asking for is the Q for each component. How do you find Q? [Hint: It's on the Preparation Lab 10 sheet. It's Question 2 and labeled as (2). It also tells you what each variable is supposed to represent].

Yea, Q is easy, what about the bottom part of question 7, regarding Delta Q correct, and neglected Mass Delta Q. I know the equation, which i got right on the next question. What I want to know is what to use for the M, Delta M

Is Delta T= 0.5

and T= (Tf-Ti)?

Thanks for any help

I believe DeltaT is another number you had to calculate using 0.5^oC. I do think that is the correct value for T. I have lab on Wednesdays so I haven't done calculations yet.

Try them in MapleTA and see if they come up correct, if it doesn't try other values in the calculations.

wat i am stuck on is finding delta T

is it same for all 4 things

and how do we find it

Yes DeltaT is the same for all four. It is given in the lab manual. Eventually you will have to find the Delta-delta-T which is uses similiar to Equation 6 from Error and Uncertainty. Because the A and B values you use to find the error are the same for all objects, all you have to do is find the square root of A squared plus B squared. [I also just gave you the formula you had to use.

Hi everyone, thanks for your help so far. Just a question....what are the units for (W/Q)...its been a long week haha. two more weeks!

Hello again....yea...so question 12 says that the units for W/Q are J/cal thank god its the last lab!

actual is: sqrt((Deltam/m)^2+(DeltadeltaT/deltaT)^2)*Qw
neglect mass is:sqrt(DeltadeltaT/deltaT)^2)*Qw

#12 to get the ratio

(4.187 -your calculated W/Q from #11)/(your calculated delta W/Q from #11)

hope that helps!