Answer:
350 J
Explanation:
The law of conservation of energy states that energy can neither be created nor destroyed but can only be converted from one form to another. This means that in a system, energy is not lost.
In this question, an unlit match contains approximately 1,000 J of chemical energy. When lit, thermal and light energy are emitted i.e. it gets converted to light and heat energy. If the thermal energy emitted was measured to be 400J, and the remaining match still contains 250J of chemical energy, then:
The amount of light energy emitted will be:
Total chemical energy (1000J) - {Remaining chemical energy (250J) + emitted thermal energy (400J)}
= 1000 - (400 + 250)
= 1000 - 650
= 350
Hence, the amount of light energy emitted is 350J
Note that, the amount of energy converted (thermal and light) and remaining chemical energy still equates the total chemical energy in the match.
CH3CH^2ch2ch2ch2ch2ch2ch2ch2ch3
Health disparities
When there are social inequalities in the places where people live, work, learn, and play, environmental factors can contribute to disease and health disparities.
These social injustices, also known as social determinants of health, include disparities in people's behaviors, cultural influences, access to healthcare, economic status, and literacy levels. When social injustices and poor environmental quality are present together, communities are said to have environmental health disparities when they experience higher rates of illness and disease than wealthier, less polluted communities.
Environmental hazards and social conditions must be taken into consideration in order to eliminate disparities in environmental health.
Find more on social inequalities at : brainly.com/question/10159402
#SPJ4
Explanation:
The representative elements are in columns A1 - A7. In an 18 column table the map is as follows:
A1 = column 1, hydrogen + alkali metals have 1 valence
A2 = column 2, alkaline earth metals have 2 valence
A3 = column 13, Boron family have 3 valence
A4 = column 14, Carbon group have 4 valence
A5 = column 15, Nitrogen family have 5 valence
A6 = column 16, Oxygen column - chalcogens have 6 valence
A7 = column 17, Fluorine column - halogens have 7 valence
<u>The group number of the representative elements = the number of valence electrons.</u>
Hello there.
<span>Why are carbon and nitrogen essential for survival to all living organisms?
</span>
<span>They are needed to release the energy stored in food.
</span>Therefore, The correct answer would be Option B.
