Question

weight of a substant in air is 5N and in water 3N ; what will be the weight in a liquid which specific density is 8/10 ??​

Answer 1

Answer:

wide Different types of constants and variables

1. Dimensional variables: The physical quantities which posses dimensions and have

variable values. Example

2. Dimensionless variables: The physical quantities which have no dimensions but have

variable values. Example

3. Dimensional constant: The physical quantities which posses dimensions and have

constant values. Example

4. Dimensionless constant: The physical quantities which do not have dimensions and have

constant values. Example

Applications of Dimensions

The concept of dimensions and dimensional formulae are put to the following uses:

(i) Conversion from one system of units to another

(ii) Checking the results obtained

(iii) Deriving relationships between physical quantities

The underlying principle for these uses is the principle of homogeneity of dimensions.

According to this principle, the ‘net’ dimensions of the various physical quantities on

both sides of a permissible

similar quantities can be added to or subtracted from each other.

(i) Conversion from one system of units to another

Different types of constants and variables

Dimensional variables: The physical quantities which posses dimensions and have

variable values. Example – area, force

Dimensionless variables: The physical quantities which have no dimensions but have

lues. Example – angle, specific gravity

Dimensional constant: The physical quantities which posses dimensions and have

constant values. Example – gravitational constant

Dimensionless constant: The physical quantities which do not have dimensions and have

constant values. Example – π, e

pplications of Dimensions

The concept of dimensions and dimensional formulae are put to the following uses:

(i) Conversion from one system of units to another

i) Checking the results obtained

relationships between physical quantities

The underlying principle for these uses is the principle of homogeneity of dimensions.

According to this principle, the ‘net’ dimensions of the various physical quantities on

both sides of a permissible physical relation must be the same; also only dimensionally

similar quantities can be added to or subtracted from each other.

i) Conversion from one system of units to another

Dimensional variables: The physical quantities which posses dimensions and have

Dimensionless variables: The physical quantities which have no dimensions but have

Dimensional constant: The physical quantities which posses dimensions and have

Dimensionless constant: The physical quantities which do not have dimensions and have

The concept of dimensions and dimensional formulae are put to the following uses:

The underlying principle for these uses is the principle of homogeneity of dimensions.

According to this principle, the ‘net’ dimensions of the various physical quantities on

elation must be the same; also only dimensionally

Explanation:

चमकदार तीव्रता मीटर, किलोग्राम मध्ये व्यक्त केली जाते,

अनुक्रमे candela.

4. पूरक एकके

वर नमूद केलेल्या सात युनिट्स व्यतिरिक्त,

आहेत (i) कोनासाठी रेडियन (rad), आणि (ii) steradian (sr)