« previous next »

Author Question: How can I rearrange this formula 1/R=A e -B/T to find the constant e and the other constant B? (Read 1371 times)

geoffrey

  • Hero Member
  • *****
  • Posts: 880
on: Oct 4, 2013
I'm conducting this thermometer experiment with the thermistor. I recorded the values on the voltmeter and the ammeter then found the resistance of the thermometer. I was then asked to plot an appropriate graph that would help to determine the constants e and B. I'm terrible at transposing formulas so if someone transpose the above formula, I will be able to continue from there. PLEASE HELP!!!!


Hawke

  • Hero Member
  • *****
  • Posts: 679
Reply #1 on: Oct 4, 2013
e is a constant.

To solve for B, first divide by A,

1/RA = e^(-BT)

Then take the natural log,

ln(1/RA) = -BT

Divide by -T,

-1/T ln(1/RA) = B

EDIT: If you want to plot a graph and solve this graphically instead of analytically, you'll first need to plug in your data and then try to use a best fit curve to approximate a trend. From there, based on the equation of that curve, you can determine B. I recommend Graphical Analysis for this - it's a fairly easy program to use and it can fit a variety of curves, without being overly complicated.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

Did you know?

A serious new warning has been established for pregnant women against taking ACE inhibitors during pregnancy. In the study, the risk of major birth defects in children whose mothers took ACE inhibitors during the first trimester was nearly three times higher than in children whose mothers didn't take ACE inhibitors. Physicians can prescribe alternative medications for pregnant women who have symptoms of high blood pressure.

Did you know?

Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

Did you know?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

For this bimolecular reaction, the rate constant k is second order For this bimolecular reaction, the rate constant k is second order
How to find the first and second differences for any table of values How to find the first and second differences for any table of values
Find derivative by using definition of the derivative question 2 Find derivative by using definition of the derivative question 2
To find derivative us the chain rule To find derivative us the chain rule
Write equilibrium constant expressions for the following reactions in terms of concentration: Write equilibrium constant expressions for the following reactions in terms of concentration:
Americium-243 has a decay constant of 9.39 × 10-5 years-1. How long will it take Americium-243 has a decay constant of 9.39 × 10-5 years-1. How long will it take
Video: The life cycle of protein

For a complete list of videos, visit our video library