# Experimental Skills-Screw Gauge (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 21 - 24 of 29

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## Question number: 21

» Experimental Skills » Screw Gauge

MCQ▾

### Question

n the NaCl molecule, the separation between the nuclei of the two atom is about 2.36 Å (1 Å = 10 -10 m). The approximate location of the center of mass from the sodium atom, assuming the mass of chlorine atom 35.5 and mass of sodium atom is

22.98 Å

### Choices

Choice (4) Response

a.

2.212 Å

b.

1.5 Å

c.

1.24 Å

d.

l Å

## Question number: 22

» Experimental Skills » Screw Gauge

MCQ▾

### Question

2 bodies of different masses of 2 kg and 4 kg are moving with, velocities 20 m/s and 10 m/s towards each other due to mutual gravitational attraction. What is the velocity of their center of mass?

### Choices

Choice (4) Response

a.

8 m/s

b.

6 m/s

c.

Zero

d.

5 m/s

## Question number: 23

» Experimental Skills » Screw Gauge

MCQ▾

### Question

If linear density of a rod of length 4m varies as λ = 2 + x them the position of the center of gravity of the rod is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 24

» Experimental Skills » Screw Gauge

MCQ▾

### Question

A ladder is leaned against a smooth wall and it is allowed to slip on a frictionless floor. Which figure represents trace of motion of its center of mass?

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page