Subject :NSO Class : Class 7
Class : Class 7
The most abundant element in the earth's crust is oxygen, making up 46.6% of the earth's mass. Silicon is the second most abundant element (27.7%), followed by aluminum (8.1%), iron (5.0%), calcium (3.6%), sodium (2.8%), potassium (2.6%). and magnesium (2.1%).
Subject :NSO Class : Class 5
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Subject :NSO Class : Class 8
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Subject :NSO Class : Class 3
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Subject :NSO Class : Class 8
The diagram shows a ray PQR travelling through a glass slab. Which option in the table gives the correct name for all three rays?
P | Q | R | |
A | Incident ray | Emergent ray | Refracted ray |
B | Incident ray | Refracted ray | Emergent ray |
C | Emergent ray | Incident ray | Refracted ray |
D | Emergent ray | Refracted ray | Incident ray |
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Subject :NSO Class : Class 7
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Subject :NSO Class : Class 4