Question

1calorie =
A.4180J
B.4.18J
C.0.418J
D. none of these

Answer 1

Hint: "Calorie" with a little "c" is frequently used to recognize the smaller units. It's additionally called the "gram-calorie" (which is presumably its most official name however it seems like an odd unit of one calorie times one gram), "gram calorie", "little calorie" or "cal".

Complete answer:
The calorie is particularly defined as the amount of heat required at a pressure of 1 standard atmosphere to raise the temperature of 1 gram of water Celsius.
There are about 81,500 calories in an individual body which sounds like a lot, but it's very small in comparison to what's found in bigger animals. A horse contains more than 200,000 calories, and a bear three times that much.
The "calorie" we refer to in food is actually kilocalorie. One (1) kilocalorie is the same as one (1) Calorie (upper case C). A kilocalorie is the amount of heat required to raise the temperature of 1 kilogram of water.
 Since 1925 this calorie has been characterized in terms of the joule, the definition since 1948 being that one calorie is equal to approximately 4.2 joules.

The correct answer is B.

Note:
Kilocalories are utilized (and abused) to communicate the measure of food expended in a serving, a dinner, or a day. It has been said that an overflow of 7700 kcal of food admission will bring about a mass addition of 1 kg, or that an excess of 3500 kcal of food admission will deliver a weight increase of one pound (1 lb).