Please select a subject first
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Identify the odd word and explain why it is odd.
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The following statement is wrong. Rewrite it correctly by changing either one or two words.
Chlorenchyma helps the plant to float in water.
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The following statement is wrong. Rewrite it correctly by changing either one or two words.
Chloroplast is present in permanent tissue.
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Explain Mendel’s monohybrid progeny with the help of any one cross.
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Explain by giving a scientific reason.
We cannot hear the echo produced in a classroom.
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Answer the following question in your own words.
What is an echo?
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Answer the following question in your own words.
Study the construction of the Golghumat at Vijapur and discuss the reasons for the multiple echoes produced there.
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Answer the following question in your own words.
What should be the dimensions and the shape of classrooms so that no echo can be produced there?
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At least one carbon bond in an unsaturated hydrocarbon is ______.
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The element hydrogen is present in ______ organic compound.
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Draw ray diagrams for the cases of images obtained in concave mirrors as described in the table below.
| Images formed by concave mirrors | ||||
| No. | Position of the object | Position of the image | Nature of image | Size of the image |
| 1 | Between pole and focus | Behind the mirror | Erect, virtual | Magnified |
| 2 | At the focus | At infinity | Inverted, real | Very large |
| 3 | Between focus and centre of curvature | Beyond the centre of curvature | Inverted, real | Magnified |
| 4 | At the centre of curvature |
At the centre of curvature | Inverted, real | Same as the object |
| 5 | Object between infinity and Centre of curvature | Between the centre of curvature and focus | Inverted, real | Diminished |
| 6 | Object at infinity | At focus | Inverted, real | Diminished |
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Answer the following question in your own words.
What factors are important to get a distinct echo?
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Write the chemical equation for the following activity.
Dilute nitric acid was added to calcium oxide.
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Write the chemical equation for the following activity.
Dilute nitric acid was added to calcium oxide.
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Write the chemical equations for the following activities.
Dilute nitric acid was added to calcium oxide.
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Write the chemical equation for the following activity:
Dilute nitric acid was added to calcium oxide.
Concept: undefined >> undefined
Write the chemical equation for the following activity.
Dilute nitric acid was added to calcium oxide.
Concept: undefined >> undefined
Write the chemical equation for the following activity.
Dilute nitric acid was added to calcium oxide.
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Complete the following table.
| u (m/s) | a (m/s2) | s (m) | v2 = u2 + 2as (m/s)2 |
| 4 | 3 | ______ | 8 |
| ______ | 5 | 8.4 | 10 |
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An electric pump has 2 kW power. How much water will the pump lift every minute to a height of 10 m?
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