Subject :NSO Class : Class 4
Subject :NSO Class : Class 9
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Subject :NSO Class : Class 6
The given table shows the degree of angular movement shown by three different skeletal joints X, Y and Z.
| Skeletal joint | Degree of movement |
| X | 360° |
| Y | 180° |
| Z | 0° |
Which of the following statements is correct regarding this?
(A) Joint X can be the joint between shoulder bone and arm.
(B) Joint Y can be the elbow joint.
(C) Joint Z can be the joint between upper jaw and rest of the skull.
(D) All of these
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Subject :NSO Class : Class 6
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Subject :NSO Class : Class 9
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Subject :NSO Class : Class 6
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Subject :NSO Class : Class 4
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Subject :NSO Class : Class 3
P is the state of matter that changes into state Q on cooling and changes into state R on heating. Select the option that correctly identifies the character of P, Q and R.
| P | Q | R | |
| A | Has no fixed volume | Has fixed shape | Has fixed shape |
| B | Has fixed volume | Has no fixed volume | Has no fixed shape |
| C | Has fixed shape | Has no fixed volume | Has no fixed shape |
| D | Has no fixed shape | Has fixed volume | Has no fixed volume |
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Subject :NSO Class : Class 5
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Subject :NSO Class : Class 7
Ans 2:
Class : Class 7
As it is not mentioned whether any specific environment was prepared, assuming it was set in normal environment, the bob's oscillation speed will decrease and time period will thus increase due to air resistance. So shouldn't it be option B?
Ans 3:
Class : Class 8
They have not mentioned whether the pendulum is in perpetual motion(Infinitely oscillates without stopping). Therefore, shouldn't the pendulum eventually stop swinging after a while due to resistance? As the amplitude decreases, the period decreases as it travels less. Therefore, I think the answer should be C.