What is the correct way to express a temperature interval in degrees Celsius?

AI Thread Summary
The correct way to express a temperature interval in degrees Celsius is debated, with options including C°, °C, and a subtraction format. According to a referenced Wikipedia article, both C° and °C are acceptable for temperature intervals. However, clarity is emphasized, suggesting that the distinction between temperature values and intervals is important. The final answer may depend on specific instructor or textbook preferences. Ultimately, for accuracy, it is advisable to consult educational materials for the preferred format.
mopar969
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A particular temperature interval, as opposed to a particular temperature value is written (a) C°, (b) °C, (c) degrees celcius minus degrees celcius (d) it makes no difference.

I am unsure as to what the question is asking.
 
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Ooops I forgot to type in the option for c. After reading the link above provided by a PF member It says that options a and b can both be used. Therefore the answer to this question is then D. Is this correct.
 
mopar969 said:
Ooops I forgot to type in the option for c. After reading the link above provided by a PF member It says that options a and b can both be used. Therefore the answer to this question is then D. Is this correct.
It really depends on your instructor or textbook and how fussy they want to be. If you wanted to be as clear as possible, how would you write a temperature interval?
 
Just to add: Since the question calls attention to a distinction between an interval and a temperature, I suspect they want you to choose which is most accurate. Otherwise why bring it up at all? (But see what your book says.)
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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