Abyssal plain
Abyssal fan
Archipelago
Atoll
Arch
The choices are confusing. Air, oil, and alcohol are fluids at any reasonable temperature. Dry cement is not.
Refrigerator was what is commonly used today. We do dry foods and salt cure but that is not done on a daily basis
Answer:
Protons and neutrons are all attracted to each other as a result - the strong nuclear force. This is an attractive force that only has an effect over a very short range in the nucleus.
Answer: 9.9%
Explanation: efficiency = (work output /work input) × 100
Note that, 1 kilocalorie = 4184 joules, hence 22kcal = 22× 4184 = 92048 joules.
Work output = 9200 j and work input = 92048 j
Efficiency = (9200/92048) × 100 = 0.099 × 100 = 9.9%