Achieve Indian Navy Agniveer Science Practice Book>Chapter 1 - Physical World and Measurement>Exercise 1>Q 8

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IMPORTANT

Earn 100

If unit of length and time is doubled, what will be the numerical value of $g$ (acceleration due to gravity)?

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Important Questions on Physical World and Measurement

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Achieve Indian Navy Agniveer Science Practice Book>Chapter 1 - Physical World and Measurement>Exercise 1>Q 9

Among the following sets, the one that cannot enter into the list of fundamental quantities in any system of units is

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Achieve Indian Navy Agniveer Science Practice Book>Chapter 1 - Physical World and Measurement>Exercise 1>Q 12

A body of mass

m = 3.513 k g

is moving along the

x -

axis with a speed of

5.00 {m s}^{- 1} .

The magnitude of its momentum (according to significant figures) is recorded as

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Achieve Indian Navy Agniveer Science Practice Book>Chapter 1 - Physical World and Measurement>Exercise 1>Q 13

The number of significant digits in

200.40

are

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Achieve Indian Navy Agniveer Science Practice Book>Chapter 1 - Physical World and Measurement>Exercise 1>Q 14

The respective number of significant figures for the numbers

23.023

,

0.0003

and

2.1 \times 10^{- 3}

are

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Achieve Indian Navy Agniveer Science Practice Book>Chapter 1 - Physical World and Measurement>Exercise 1>Q 15

The dimensions of

K

in the equation

W = \frac{1}{2} K x^{2}

is:-

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Achieve Indian Navy Agniveer Science Practice Book>Chapter 1 - Physical World and Measurement>Exercise 1>Q 16

Force

(F)

and density

(d)

are related as

F = \frac{α}{β + \sqrt{d}}

then dimension of

α

are

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Achieve Indian Navy Agniveer Science Practice Book>Chapter 1 - Physical World and Measurement>Exercise 1>Q 17

In

C . G . S .

system, the magnitude of the force is

100 dyne .

In another system where the fundamental physical quantities are kilogram, metre and minute, the magnitude of the force is

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Achieve Indian Navy Agniveer Science Practice Book>Chapter 1 - Physical World and Measurement>Exercise 1>Q 18

If

E

,

m

,

l

and

G

denote the energy, mass, angular momentum and gravitational constant respectively, the quantity

(\frac{E l^{2}}{m^{5} G^{2}})

has the dimensions of