# NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 1458 - 1462 of 2000

Access detailed explanations (illustrated with images and videos) to 2000 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Subscription can be renewed yearly absolutely FREE! View Sample Explanation or View Features.

Rs. 550.00 or

How to register?

## Question number: 1458

Edit
MCQ▾

### Question

The time period of a simple pendulum is . If the length of the pendulum is three times, the new time period will be:

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 1459

Edit
MCQ▾

### Question

A longitudinal wave consists of:

### Choices

Choice (4) Response

a.

a number of rarefaction pulses one after the other

b.

a compression and a rarefaction pulse separated by a distance equal to one wavelength

c.

a number of compression pulses one after the other

d.

compression and rarefaction pulses one after the other

## Question number: 1460

Edit
MCQ▾

### Question

From a top of a tower of height , a boy projects a ball vertically upwards with an initial velocity of such that it eventually falls to the ground. At what time will the ball reach the ground?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 1461

Edit
MCQ▾

### Question

A ball is thrown vertically upwards with an initial velocity of . The time taken by the ball to strike the ground is –

(Acceleration due to gravity is )

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 1462

Edit
MCQ▾

### Question

Two bodies of masses and are moving along the same line and direction with velocity of and , respectively. They collide and after the collision, the first body moves at a velocity of . Determine the velocity of the second body.

### Choices

Choice (4) Response

a.

b.

c.

d.

Developed by: