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```
there are two more questions which i dint get.....the questions are as follows:- 1]the pressure of liquid column depends on its height h, the density p[its the symbol of density],acceleration due to gravity g,show that p=h [symbol of density]p g by dimensional method.(give constant k=1) 2]express a pressure of 50 N/metre square in terms of dyne/cm square. urgently needed for the test tht is conducted tomorrow...............

```
11 years ago

```							Hi
Take, P= k x ha x Þb x gc .
dimensions of P are kg/ms2 . Write the dimensions of h, g & Þ .
h=m , g=m/s2 , Þ= kg/m3
Equate the power of each i.e of m, kg and sec on the left hand side to rt hand side. U ll get three equations, solve them for three variables. U ll get the final answer as a=b=c=1 .
therefore P=hÞg as k=1
```
11 years ago
```							Ans 2:

Units of force

newton
(SI unit)
dyne
kilogram-force,
kilopond
pound-force
poundal

1 N
≡ 1 kg·m/s²
= 105 dyn
≈ 0.10197 kp
≈ 0.22481 lbf
≈ 7.2330 pdl

1 dyn
= 10−5 N
≡ 1 g·cm/s²
≈ 1.0197×10−6 kp
≈ 2.2481×10−6 lbf
≈ 7.2330×10−5 pdl

1 kp
= 9.80665 N
= 980665 dyn
≡ gn·(1 kg)
≈ 2.2046 lbf
≈ 70.932 pdl

1 lbf
≈ 4.448222 N
≈ 444822 dyn
≈ 0.45359 kp
≡ gn·(1 lb)
≈ 32.174 pdl

1 pdl
≈ 0.138255 N
≈ 13825 dyn
≈ 0.014098 kp
≈ 0.031081 lbf
≡ 1 lb·ft/s²

1 Newton=  105dynes and 1 m = 100cm , therefore 1m2 = 104cm2 .
therefore 50N/m sq = 50 x 105 / 104 dynes /cm sq, hence answer is 500.
```
11 years ago
```							u can use..........M1/M2=1000  L1/L2=100 T1/T2=1
n1ui=n2u2..........take the dymensional formula of newton/metresquare...
```
10 years ago
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