two lenses a convex lens of focal length 20cm anad a concave lens for focal length 25 cm are held to close to each other . the focal length of the combination of the lenses is
Anonymous Quiz
33%
+45 cm
37%
---5 cm
21%
---45cm
9%
+100 cm
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a solution of a substance which is used for white washing ?
Anonymous Quiz
33%
calcium hydroxide
22%
calcium oxide
40%
calcium carbonate
5%
none
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in humans the oxygen rich blood from the lungs come to the
Anonymous Quiz
32%
left atrium
39%
right atrium
21%
left ventricle
8%
right ventricle
During respiration the exchange of gases take place in
Anonymous Quiz
27%
Trachea and larynx
61%
Alveoli of lungs
8%
Alveoli of throat
5%
Throat and larynx
The internal energy reserve in autotrophs is
Anonymous Quiz
46%
Glycogen
31%
Starch
15%
Protein
7%
Fatty acid
Two upper chamber of heart are called
Anonymous Quiz
40%
Atria
36%
Ventricle
19%
Both
6%
Mai nhi batugya
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