# Physics [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 254 - 261 of 285

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## Question 254

Edit

### Question

MCQ▾

Two person lift a body of mass to a height of individually in times and , respectively. Then the ratio of work done by them is:

### Choices

Choice (4)Response

a.

b.

c.

d.

### Passage

Displacement of a progressive wave at different interval of time is shown in the graph. Study it carefully and answers the questions:

## Question 255 (1 of 4 Based on Passage)

Physics
Edit

### Question

MCQ▾

Frequency of the wave is:

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 256 (2 of 4 Based on Passage)

Physics
Edit

### Question

MCQ▾

Time period of the wave is:

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 257 (3 of 4 Based on Passage)

Physics
Edit

### Question

MCQ▾

Amplitude of the given progressive wave is:

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 258 (4 of 4 Based on Passage)

Physics
Edit

### Question

MCQ▾

If the speed of given progressive wave is , then the wavelength of the wave is:

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 259

Edit

### Question

MCQ▾

A body of mass kept at rest breaks into two parts due to internal forces. One part of mass is travel with velocity towards south Therefore velocity of other part is:

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 260

Edit

### Question

MCQ▾

A body, which has no airspace, is of mass and volume is put in water. The body will:

### Choices

Choice (4)Response

a.

Partially sink

b.

Float

c.

Sink

d.

All of the above

## Question 261

Edit

### Question

MCQ▾

A ball of mass , moving with speed of , has a head on collision with stationary ball of mass . If after the collision, the two balls moves together, the loss in kinetic energy due to collision is:

### Choices

Choice (4)Response

a.

b.

c.

d.