The mass of an atom comes from the protons and neutrons that are found in the nucleus. The number of protons is the atomic number of an element. To find the number of neutrons, subtract the atomic number from the mass of an atom. The atomic number is 8 and the atomic mass is 16.
Answer:
442.7m
Explanation:
12.42m+421.0m+9.28
442.7m
c. hydrogen
b. fuel
d. oxygen
Fuel is NOT an element that must be present for a fire to occur. Hence, option C is correct.
The substances which on burning produce heat energy are called fuels.
The 3 things a fire needs are heat, fuel and oxygen.
These three elements work together to help a fire start and take over.
However, if any of the three elements are removed from a fire, then it will extinguish and no longer pose a threat.
Hence, option C is correct.
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Hi There
The answer is C
I hope that's help !
(2) 1670 J (4) 11 300 J
Answer:
It’s 2)
Explanation:
The field of physics known as calorimetry determines how much heat is transferred during a chemical or physical process.
It requires precisely calculating the heat transport in a system using a calorimeter, a specialist tool. Two substances coming into contact at differing temperatures normally causes heat exchange to occur until thermal equilibrium is attained. The amount of heat transported can be determined by monitoring the temperature change and taking into account the individual heat capacity of the substances involved. Calorimetry has many uses, including figuring out how much energy is in food, researching chemical processes, and looking at the thermal characteristics of various materials. It is necessary to comprehend how energy is transformed in distinct systems.
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