A device that converts heat into mechanical work is called
Anonymous Quiz
54%
Heat engine
15%
Refrigerator
27%
both a and b
4%
none of above
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A heat engine source has to be at a higher temperature for it to work. TRUE or FALSE
Anonymous Quiz
77%
True
23%
False
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What does a sink do in a heat engine ?
Anonymous Quiz
27%
It releases the heat towards engine.
41%
It absorb the heat from engine.
28%
It absorbs the heat from source.
4%
none of above
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Work done by a heat engine if Q₁ is the heat from source and Q₂ is the heat absorbed at sink.
Anonymous Quiz
29%
Q₁ /Q₂ J
16%
Q₁ J
35%
Q₁ - Q₂ J
19%
Q₂ - Q₁ J
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The efficiency of an engine will always be given by
Anonymous Quiz
50%
Output energy / Input energy
33%
Input energy / Output energy
13%
Output energy*Constant
4%
Input energy* Constant
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Consider 2 satellites A and B having time periods 16 hours and 1 hour, respectively. What is the ratio of the radius of their orbits?
Anonymous Quiz
27%
4:1
27%
8:1
31%
16:1
15%
64:1
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✅Important Questions for NEET 2023 Biology
1. What is the correct representation of organisation levels in living beings?
👉🏻Atomic→Molecular→Subcellular→Cellular→Tissue→Organ System→Individual
2. What is the first step of taxonomy?
👉🏻The first step of taxonomy is the identification of the organism.
3. What is the sequence of taxonomic categories?
👉🏻Division→Class→Order→Family→Tribe→Genus→Species
4. What do you mean by Biological Classification?
👉🏻To identify dissimilarities among organisms and place them into groups that reflect their most important features and relationship.
5. Why does Funaira require water?
👉🏻In Funaira, fertilisation occurs only in water. Therefore, it requires water.
6. What do you mean by Phenetics?
👉🏻Phenetics is a method of classification based on similarities between organisms without regard to their evolutionary relationships. In this classification, the organisms are arranged according to the overall similarities of existing organisms based on observation characters.
7. Name the two animals that have non-glandular skin.
👉🏻Chameleon and Turtle.
8. Name the common feature shared by birds and mammals.
👉🏻Both are warm-blooded.
9. What are adventitious roots?
👉🏻Roots developed from the part of the plant other than the radicle are called adventitious roots.
10. Where does the placenta attach to develop the seed?
👉🏻It is attached to the developing seed near the hilum
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1. What is the correct representation of organisation levels in living beings?
👉🏻Atomic→Molecular→Subcellular→Cellular→Tissue→Organ System→Individual
2. What is the first step of taxonomy?
👉🏻The first step of taxonomy is the identification of the organism.
3. What is the sequence of taxonomic categories?
👉🏻Division→Class→Order→Family→Tribe→Genus→Species
4. What do you mean by Biological Classification?
👉🏻To identify dissimilarities among organisms and place them into groups that reflect their most important features and relationship.
5. Why does Funaira require water?
👉🏻In Funaira, fertilisation occurs only in water. Therefore, it requires water.
6. What do you mean by Phenetics?
👉🏻Phenetics is a method of classification based on similarities between organisms without regard to their evolutionary relationships. In this classification, the organisms are arranged according to the overall similarities of existing organisms based on observation characters.
7. Name the two animals that have non-glandular skin.
👉🏻Chameleon and Turtle.
8. Name the common feature shared by birds and mammals.
👉🏻Both are warm-blooded.
9. What are adventitious roots?
👉🏻Roots developed from the part of the plant other than the radicle are called adventitious roots.
10. Where does the placenta attach to develop the seed?
👉🏻It is attached to the developing seed near the hilum
➡️ Join For Biology :
https://t.me/+ndr_cr0luFJhMTU1
➡️ Join For Chemistry :
https://t.me/+VuhVtiDnZ-VhNGMx
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What is the total energy possessed by a satellite of mass “m” orbiting above the earth of mass “M” and radius “R” at a height “h”?
Anonymous Quiz
26%
[(G*M*m)/2*(R+h)]
52%
-[(G*M*m)/2*(R+h)]
16%
[(G*M*m)/(R+h)]
6%
-[(G*M*m)/(R+h)]
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