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Sagot :
Answer:
400kj
Explanation:
h =mass × specific heat capacity × change in temperature
= 2×2000×[120-20]
=2×2000×100
=400000j
=400kj
400kj of energy is needed.
Energy:
- Energy, which is observable in the execution of labor as well as in the form of heat and light, is the quantitative quality that is transferred to a body or to a physical system in physics.
- Energy can be transformed in form but cannot be created or destroyed, according to the rule of conservation of energy.
- The joule, which is the energy supplied to an object by the labor of moving it a distance of one meter against a force of one newton, is the unit of measurement for energy in the International System of Units (SI).
Cooking oil:
- Cooking oil is a liquid fat made of plants, animals, or synthetic materials that are used in baking, frying, and other cooking processes.
- It may also be referred to as edible oil because it is used in cold food preparation and flavoring, including salad dressings and bread dips.
- At room temperature, cooking oil is normally a liquid, although some saturated-fat oils, such as coconut oil, palm oil, and palm kernel oil, are solids.
Solution -
Formula - h = mass × specific heat capacity × change in temperature
So,
[tex]2[/tex] × [tex]2000[/tex] × [tex][120-20][/tex]
[tex]2[/tex] × [tex]2000[/tex] × [tex]100[/tex]
[tex]=400000j\\=400kj[/tex]
Therefore, 400kj of energy is needed.
Know more about energy here:
https://brainly.com/question/13881533
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