# physics

A faulty Celsius thermometer read 0.7degrees Celsius at melting point of pure ice and 99.5degrees Celsius at boiling point of water at normal pressure.
What is the correct temperature when it reads 30 degrees Celsius

error = e = Ce - C
I assume error = e = m C + b
then
.7 = m(0) + b so b = .7
99.5 - 100 = -.5 = m(100) +.7

100 m = -1.2
m = -.012

at Ce = 30
e = 30 - C = -.012 C + .7
C-.012 C = 29.3
.988 C= 29.3
C = 29.7

posted by Damon

## Similar Questions

1. ### physics

the steam point and ice point of a mercury thermometer are wrongly marked as 92 degree Celsius and 2 degree Celsius respectively.the correct temperature read by this thermometer is?
2. ### university physics

A platinum resistance thermometer has resistances of 200.0 ohms when placed in a 0 degrees Celsius ice bath and 253.8 ohms when immersed in a crucible contacting melting potassium. What is the melting point of potassium? Hint:
3. ### Portions and integers

I need help please. Mercury is a metal that is liquid at room temperature. Its melting point of -39 degrees Celsius. The melting point of isopropyl alcohol is -89 Celsius. (Part A) In the context of this problem, what does zero
4. ### physics

a faulty thermometer registers 102.5 degree at 100 degree Celsius .if the thermometer has no zero error what will it register at 500 degree Celsius.
5. ### PHYSICS 102E

1. How much ice at -10 degrees Celsius is required to cool a mixture of 0.1 kg ethyl alcohol and 0.1 kg water from 20 degrees Celsius to 0 degrees Celsius? 2. Find the heat produced by 1 KW heating element in one hour. 3. A 3g
6. ### Chemistry Q1,3,5

1) What would be the preferred heating device (s) in each of the following situations? a) reflux a solvent with a 56 degree Celsius boiling point b) reflux a solvent with a 110 degree Celsius boiling point c) distillation of a
7. ### Chemistry Plz Help

Calculate the correct boiling point for nitrobenzene. Assume that a total immersion thermometer was used. The obs. boiling point was 205 degree celsius. The reflux ring in the test tube just reached up to the 0 degree celsius mark
8. ### Chem Help!!!!

What Celsius temperature will the Fahrenheit thermometer be 4-times more than on the Celsius thermometer? At what Celsius temperature will the numerical reading on the Fahrenheit thermometer be 1/9 that on the Celsius thermometer?
9. ### physics,

A 40degree Celsius thermometer reads 0.7degree Celsius at it boiling point of water. Evaluate the correct thermometerwhen it reads at 30degree Celsius
10. ### science

which substance has a melting point of -219 degree celsius and boiling point of -183 celsius at room temperature 30 degree celsius

More Similar Questions