Subject :NSO Class : Class 1
Subject :NSO Class : Class 8
Ans 2:
Class : Class 9
The correct answer is D.
In a transverse wave the direction of the movement of the particle is perpendicular to direction of motion of the wave.
So, over here, when we move the end Q from left and right , it will produce a transverse wave,. You can check it by observing it from the top.
Ans 5:
Class : Class 8
In my opinion, the answer should be both option (C) and option (D). Transverse waves are waves in which the motion of particles are perpendicular to the motion of the wave (for example, light). Moving the slinky at an angle of 45 degrees to the table would create a wave, just not a perpendicular one, and thus not a transverse wave. This excludes option (A). Option (B) is also excluded, as it creates a longitudinal wave (motion of the particles is parallel to the motion of the wave). Option (C) involves the wave being moved up and down (assumed to be at right angles, since it is not mentioned). The slinky thus also moves up and down, and creates a transversal wave (as the motion of the wave is from Q to P, and the motion of the parts of the slinky is perpendicular to line QP). Option (C) is thus correct. Option (D) involves the wave being moved left to right (assumed to be at right angles, since it is not mentioned). This also created a transverse wave (as the motion of the parts of the slinky is perpendicular to the motion of the wave from Q to P). Option (D) is thus, also correct. Since we live in a three dimensional world, and it is not mentioned in the question that the experiment is performed in a 2 dimensional world, we can assume that the experiment is done in a 3D world. Due to the presence of length, breadth and height, the slinky can be moved in two ways perpendicular to line QP (i.e. the slinky). Given that both ways this can be done are mentioned in the question, both options must be correct. Therefore, I opine that the correct answer is both option (C) and option (D).
Ans 8: (Master Answer)
Class : Class 1
The correct answer is D
In transverse wave, vibration of a wave is perpendicular to its direction of propagation of wave.
Ans 10:
Class : Class 8
Won't moving the slinky up and down produce the same result? You can check b observing from the side.
Post Your Answer
Subject :NSO Class : Class 7
Ans 2: (Master Answer)
Class : Class 1
The correct answer is A.
Sugar syrup is neutral and hence the colour of blue litmus and red litmus remains unchanged. Tamarind juice is acidic, so blue litmus turns red but red litmus does not change its colour. Lime water and soap solution are basic in nature which turn red litmus blue whereas blue litmus remains unchanged.
Post Your Answer
Subject :NSO Class : Class 7
Ans 1: (Master Answer)
Class : Class 1
Fish Y will be least affected as it is camouflaging with the sea weeds. Fish Y can easily escape from the predator by blending with the surrounding environment.
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Subject :NSO Class : Class 7
Ans 5:
Class : Class 7
I think B is the correct answer because there is no solidification taking place or else the water would have turned into ice. plus no solidification can take place when water is at room temperature.
Ans 7:
Class : Class 7
There is no proper solution for this question which will make it more confusing as everyone will have different opinions in this question.
Ans 10:
Class : Class 8
It is cooling towards room temperature so it does not solidify since the freezing point is below room temperature.
Ans 12:
Class : Class 10
i think there is no option correct in this ques. no evaporation and boiling is taking place as it is cooling down towards the room temperature. also no condensation is taking place as in the ques it is written a HOT liquid is being transferred to a beaker. as well as solidification may also not take place because room temp is above 0 degree centigrate. SOF PLEASE SEE TO IT THAT THIS TYPE OF WRONGG QUESTIONS AND SOLUTIONS ARE NOT POSTED.
Ans 13:
Class : Class 7
Three states - gas , liquid & solid
When hot water temp is going down it will be ultimate become solid ie ice
But before becoming ice temp will stagnant for some time where in both states liquid & solid co-exist==> some part of liquid is in ice form.
X is the same state where in solid and liquid will co-exist. Hence option 4 is correct(solidification& evaporation)
Note: Could not attach gif .It would have made it more clear.
Ans 19:
Class : Class 8
at 4 degree celsius water starts expanding and 'x' shows the same the room temperature might have been near or equal to the freezing point of water(eg room temperature of regions like arctic and antarctic)
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Subject :NSO Class : Class 3
Post Your Answer
Subject :NSO Class : Class 4
The following table shows some information on four plants, (A), (B), (C) and (D). A tick (√) indicates that the plant shows that particular characteristic.
Based on the information above, which letter, W, X, Y or Z, best represent plants (C) and (D)?
| Plant (C) | Plant (D) | |
| A | W | X |
| B | X | Y |
| C | Y | Z |
| D | Z | W |
Ans 3: (Master Answer)
Class : Class 1
The correct answer is A.
Both plants ‘c’ and ‘d’ bear fruits. This means they are flowering plants as only flowers change into fruits. Plant ‘c’ grows in water i.e., it is an aquatic plant but plant ‘d’ does not grow in water thus, it is a nonaquatic plant. Hence 'W' and 'X' represent plant ‘c’ and ‘d’ respectively.
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Subject :NSO Class : Class 8
Ans 1:
Ans 7:
Ans 8: (Master Answer)
Class : Class 1
The correct answer is B
In given figures, both the circuits are tightly connected and both the liquids conduct electricity because both the bulbs are glowing. The bulb in the set up P glows more brightly as compared to that of the set up Q might be because of any of the two possibilities:
1. The liquid in Q may have small conductivity.
2. Liquid in P is equivalent to a battery while liquid in Q is equivalent to a cell of the battery of liquid P.
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Subject :NSO Class : Class 4
Post Your Answer
Subject :NSO Class : Class 3
Ans 1:
Class : Class 8
the answer of this question is drawing because when we dry something moisture is removed from it.