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Anupal Das
Subject: Physics
, asked on 2/1/18
What is the principle behind the carburettor of an automobile?
Answer
2
Naga Nandhini
Subject: Physics
, asked on 2/1/18
The density of the atmosphere at sea level is 1.29 kg/m3. Assume that it does not change with altitude. Then how high would the atmosphere extend?
Answer
1
Naga Nandhini
Subject: Physics
, asked on 2/1/18
What is the pressure on a swimmer 10 m below the surface of a lake?
Answer
1
Dharunika Vijayakumar
Subject: Physics
, asked on 2/1/18
define streamline effect ?
Answer
3
Yayati
Subject: Physics
, asked on 1/1/18
Eight rain drops of radius one mm each falling down with terminal velocity of 5 cm/s coalesec to form a bigger drop . Calculate the terminal velocity of bigger drop .
Answer
1
Yayati
Subject: Physics
, asked on 1/1/18
Solve this:
Answer
1
Naga Nandhini
Subject: Physics
, asked on 31/12/17
Derive the poiseulli's formula dimensionally! Please give the answer fast,I'm having my model P.T-2 today
Answer
1
Naga Nandhini
Subject: Physics
, asked on 31/12/17
(i) Pressure decreases as one ascends the atmosphere. If the density of air is p, what is the Change in pressure dp over a differential height dh?
(ii) Considering the pressure p to be proportional to the density, find the pressure p at a height h if the pressure On the surface of the earth is
p
o
.
(iii) If
p
o
= 1.03 x
10
3
N
m
2
,
p
o
=1.29 kg
m
-
3
, g = 9.8 m
s
-
2
at what height will be pressure drop to
1
10
the value at surface of the earth?
(iv) This model of the atmosphere works for relatively small distances. Identifying the underlying assumptions that limits the model.
(v) Explain in brief what will happen, if the length of the capillary tube is smaller than the height to which the liquid rises?
Answer
1
Naga Nandhini
Subject: Physics
, asked on 31/12/17
Pressure decreases as one ascends the atmosphere. If the density of the air is rho,what is the change in pressure dp over dh?
Answer
1
Jeneeta Eliza John
Subject: Physics
, asked on 29/12/17
If velocity of flow is 4m/s then velocity head is
Answer
1
Yayati
Subject: Physics
, asked on 28/12/17
An oil drop falls through air with a terminal velocity of 5*10^-4 then radius of drop will be
Answer
1
Naga Nandhini
Subject: Physics
, asked on 28/12/17
determine the height h of an oil in the u tube as whole,density of oil=0.9g/cc.Density of liquid=1.6g/cc.Denisty of mercury=13.6g/cc
Answer
1
Naga Nandhini
Subject: Physics
, asked on 28/12/17
Define angle of contact .Explain the 2 conditions.
Answer
1
Arshia Sharma
Subject: Physics
, asked on 25/12/17
Ques 18:
18. A Cubical metal block of edge 12 cm floats in mercury with one fifth of the height inside the mercury. Water is poured till the surface of the block is just immersed in it. Find the height of the water column to be poured. Specific gravity of mercury = 13.6
Answer
1
Arshia Sharma
Subject: Physics
, asked on 25/12/17
A U-tube is supported with its limbs vertical and is partly filled with water. If internal diameters of the limbs are 1 cm and 0.01 cm respectively, what will be the difference in height of water in the two limbs? Surface tension of water is 70 dyne cm
–1
.
In the given problem, find the height of the water in the two limbs independently. Then take the difference of these heights. Angle of contact for water = 0°.
Answer
1
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What are you looking for?
(ii) Considering the pressure p to be proportional to the density, find the pressure p at a height h if the pressure On the surface of the earth is .
(iii) If = 1.03 x , =1.29 kg, g = 9.8 m at what height will be pressure drop to the value at surface of the earth?
(iv) This model of the atmosphere works for relatively small distances. Identifying the underlying assumptions that limits the model.
(v) Explain in brief what will happen, if the length of the capillary tube is smaller than the height to which the liquid rises?
18. A Cubical metal block of edge 12 cm floats in mercury with one fifth of the height inside the mercury. Water is poured till the surface of the block is just immersed in it. Find the height of the water column to be poured. Specific gravity of mercury = 13.6
In the given problem, find the height of the water in the two limbs independently. Then take the difference of these heights. Angle of contact for water = 0°.