When dealing with an interval scale such as fahrenheit temperature, it is correct to say
a. the difference between 90 and 30 is three times the difference between 40 and 20
b. 60 is three times as hot as 20
c. both a and b are correct
d. none of the above are correct

(c) both (a) and (b) are correct

Explanation:

Let take the temperature first 90°F and 30°F

Then the difference between the temperature = 90°F-30°F=60°F

Now the temperature is given as 40°F and 20°F

Then the difference between the temperature = 40°F-20°F=20°F

We can see that 60 is 3 times of 20 so option (a) will be correct

Now as the heat is linearly dependent on the temperature as so at 60°F it will be 3 time hotter than at 20°F

So option (b) is also correct as option (a) and (b) are given in option (c) so option (c) will be the correct option

as technology advances, new experiments often expose problems in accepted theories. c

hope i

-lavira: )

answer: the exterior temperature of commercial jet planes as they leave the stratosphere and return to the ground increases steadily.

explanation:

the lower most layer of atmosphere is troposphere which extends from 0 to 12 km above the surface of the earth. the temperature initially decreases as distance is increased from the earth's surface. commercial jets fly in lower part of the stratosphere. the stratosphere extends upto 50 km. the temperature in stratosphere starts rising again due to presence of ozone which traps the uv rays.

thus, when the planes leave the stratosphere and return to the ground, the exterior temperature increases steadily.