Subject :NSO Class : Class 5
Subject :NSO Class : Class 9
A boy takes 5 seconds to reach each point from A to B, B to C and C to D as shown in the diagram. If AB = BC = CD = 20 m then which of the following information is correct when the boy reaches point D from point A?
| Velocity (m s-1) | Speed (m s-1) | |
| A | 4 | 4 |
| B | 1.33 | 1.33 |
| C | 4 | 1.33 |
| D | 1.33 | 4 |
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Subject :NSO Class : Class 9
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Subject :NSO Class : Class 7
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Subject :NSO Class : Class 6
Ans 1:
Class : Class 7
The answer should be D because the soil that takes the most time to let the water pass through retains water for the longest time. Since mangroves are usually found in the clayey soil, D is the correct one.
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Subject :NSO Class : Class 10
The diagram shows a circuit in which all the switches are open.
Which of the following switch positions would give a resistance of 4 W between X and Y ?
| S1 | S2 | S3 | S4 | |
|---|---|---|---|---|
| A | Closed | Open | Open | Closed |
| B | Closed | Open | Closed | Open |
| C | Open | Closed | Open | Closed |
| D | Open | Closed | Closed | Open |
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Subject :NSO Class : Class 10
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Subject :NSO Class : Class 6
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Subject :NSO Class : Class 8
Match the column I with column II and select the correct option from the codes given below.
| Column I | Column II |
| (A) A girl pulling the leash of a running dog | (i) Impact force can make stationary object to move by an another moving object |
| (B) A driver turning the steering wheel of a car | (ii) Gravity acts upon an object |
| (C) When you hit a nail with a hammer | (iii) Force can make an object go slower |
| (D) A ball released from top of a tower | (iv) Force can change the direction of a moving object |
A (A)-(i), (B)-(ii), (C)-(iii), (D)-(iv)
B (A)-(iii), (B)-(iv), (C)-(i), (D)-(ii)
C (A)-(ii), (B)-(i), (C)-(iv), (D)-(iii)
D (A)-(iv), (B)-(iii), (C)-(ii), (D)-(i)
testing
Ans 1:
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Subject :NSO Class : Class 6
Ms Naina, a science teacher divided the class into four groups and each group was given different mixtures :
Group I : Sand and iron filings
Group II : Oil and water
Group III : Salt and sand
Group IV : Wheat and husk
Which of the following methods should each group use to separate the components of mixtures given to them?
| Group I | Group II | Group III | Group IV | |
| A | Magnetic separation |
Seprating funnel |
Filtration followed by evaporation |
Winnowing |
| B | Sieving | Filtration | Winnowing | Sieving |
| C | Winnowing | Decantation | Sieving | Filtration |
| D | Magnetic separation |
Filtration | Sieving | Winnowing |