The Sun is a hot plasma (ionized matter) with its inner core at a temperature exceeding 107 K, and its outer surface at a temperature of about 6000 K. At these high temperatures, no substance remains in a solid or liquid phase. In what range do you expect the mass density of the Sun to be, in the range of densities of solids and liquids or gases ? Check if your guess is correct from the following data :Mass of the Sun = 2.0 ×10 30kg, Radius of the Sun = 7.0 × 108m from Physics Units and Measurement Class 11 Manipur Board
Zigya Logo

Chapter Chosen

Units and Measurement

Book Chosen

Physics Part I

Subject Chosen

Physics

Book Store

Download books and chapters from book store.
Currently only available for.
CBSE Gujarat Board Haryana Board

Previous Year Papers

Download the PDF Question Papers Free for off line practice and view the Solutions online.
Currently only available for.
Class 10 Class 12
The Sun is a hot plasma (ionized matter) with its inner core at a temperature exceeding 107 K, and its outer surface at a temperature of about 6000 K. At these high temperatures, no substance remains in a solid or liquid phase. In what range do you expect the mass density of the Sun to be, in the range of densities of solids and liquids or gases ? Check if your guess is correct from the following data :
Mass of the Sun = 2.0 ×10 30kg,
Radius of the Sun = 7.0 × 108m


Mass space of space the space Sun comma space straight M space equals space 2 cross times 10 to the power of 30 space kg space

Raidus comma space straight r equals space 7 cross times 10 to the power of 8 space straight m space

Therefore comma space

Density space of space the space Sun space equals space straight M over straight V space
space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space fraction numerator straight M over denominator begin display style bevelled 4 over 3 end style πr cubed end fraction space equals space fraction numerator 3 cross times 2 cross times 10 to the power of 30 over denominator 4 straight pi space left parenthesis 7 cross times 10 to the power of 8 space straight m space right parenthesis cubed end fraction space

space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 1400 space kg divided by straight m to the power of 3 space end exponent

That space is comma space

Mass space density space of space Sun space is space in space the space range space of space mass space densities
of space solids divided by liquids space and space not space gases. space
106 Views

What is the need of measurement?

To get the complete knowledge of any physical quantity, measurement is needed. Measurement of any physical quantity involves comparison with a certain basic, arbitrarily chosen, internationally accepted reference standard called unit. Knowledge without measurement is incomplete and unsatisfactory. 
825 Views

What is measurement?

Measurement is the process of attaching a numeric value to an aspect of a natural phenomenon. Measurement is making the quantitative knowledge of a physical quantity. 
1289 Views

Give four examples of physical quantities.

Examples of Physical quantitie are force, mass, density and power.
821 Views

Define unit.

The quantity used as a standard of measurement is called unit. 

Example: Unit of time is second. 

1172 Views

Define physical quantity.

 


A measurable quantity in terms of which laws of Physics can be expressed is called physical quantity.

The result of a measurement of a physical quantity is expressed by a number accompanied by a unit.


878 Views