Questions are on the first photo. 2. The Mechanical equivalent of heat: Using th

Question

Questions are on the first photo. 2. The Mechanical equivalent of heat: Using the table provided, what is the change in the thermistor resistance if its temperature rises from 21 C to 30 C? Does it matter how many turns of cord surround the cylinder? Why? Does it matter how fast you turn the crank? Why? Suppose the cord, where it is attached to the post, is under tension during the experiment Would this lead to an error in your measured value of the mechanical equivalent of heat? If so, would your value be too large, or too small?

Explanation / Answer

change in resistence = 120.810 - 79.422 = 41.388 ohm

It does matter because the length of cord wrapped around determines the amount of friction.
it does matter because the faster you crank the more revolutions and therefore gets more work done per turn. If turned quickly enough it can make the cord tension vanish.

The measured value would affect the heat.

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.