First slide

Temperature and heat-thermal properties of matter

Question

At what temperature centigrade & Fahrenheit scales are show’s same reading

Easy

A

$30^{0}$
B

$- 30^{0}$
C

$40^{0}$
D

$- 40^{0}$

Solution

$r e l a t i o n b e t w e e n c e n t r i g r a d e a n d f a h r e n h e i t s c a l e o f t h e r m o m e t e r i s \frac{C}{5} = \frac{F - 32}{9}, h e r e C i s f o r r e a d i n g o n c e n t i g r a d e s c a l e a n d F i s f o r r e a d i n g o n f a h r e n h e i t s c a l e L e t C = F = x (b y q u e s t i o n b o t h s h o u l d h a v e s a m e r e a d i n g) x = - 40^{0} C$

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