Download App

Work And Energy — Science STD 9 — Question

Rajasthan BoardEnglish MediumSTD 9ScienceWork And Energy1 Mark
Question
One joule $= ..........$ erg.
✓

Answer

Unit of energy is joule $= \ kgm^2/s^{2 }$
Joule is a $\text{MKS}$ unit and erg is a $\text{CGS}$ unit
$\text{MKS} = \text{CGS}$
$1m = 100\ cm$
$1s = 1s $
$1\ kg = 1000\ gm$
From above :
$1$ joule $= 1\ kgm^2/s^2$
$= 1000 \times 10000/1 \ cmm^2/s^2$
$= 10^7 gm*cm^2/s^2 $
$= 10^7erg$
So$, 1$ joule $= 10^7erg$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Fill in the blank" from Work And Energy→Work And Energy — all question types→Science STD 9 question papers→Rajasthan Board STD 9 question papers→Rajasthan Board question paper generator→

Similar questions

Fill in the following blanks with suitable word:
1 joule is the work done when a force of one ______ moves an object through a distance of one ______ in the direction of _______.
→
Fill in the following blanks with suitable word:
An echo is simply a ______ Sound.
→
Fill in the following blanks with suitable words:
In a chemical reaction, the sum of the masses of the reactants and the products remains unchanged. This is called _________.
→
Fill in the blanks with suitable words:
Acceleration is the rate of change of $...............$ It is measured in $...............$
→
Fill in the following blanks with suitable word:
The electricity meter installed in our home measures electric energy in the units of _____.
→
Fill in the blanks.
Bone possesses a hard matrix composed of _________ and __________ .
→
The lightest element is ________.
→
Fill in the following blanks with suitable words:
A sulphide ion has negative charge because it contains less ____________ than ____________.
→
Fill in the following blanks with suitable word:
The speed of sound in a solid is ____ than the speed of sound in air.
→
Fill in the following blanks in respect of an atom of an element:
No. of Protons
No. of Neutrons
Mass number
Atomic number
No. of electrons
Symbol
11
12
............
............
............
............
→