We define the specific heat of a material as the energy that must be transferred to 1.0 kg of that material in order to cause it to warm 1.0∘c. part a what happens to the specific heat if we transfer twice that much energy?

No change in the specific heat.

Explanation:

Specific heat is an intrinsic property that it has not depend upon on the amount of substance or energy added, it depends upon the material.

So, when twice the amount of energy is transferred, specific heat of the material does not change rather the energy that is twice in the amount to 1 kg of that material cause it to warm 2.0° C.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form