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Shreya Choudhary
Subject: Physics
, asked on 19/1/18
Solve this:
A wooden plank of length 1 m and uniform cross section hinged at one end to the bottom of a tank as shown in figure (13-W5). The tank is filled with water up to a height of m. The specific gravity of the plank is 0.5m. Find the angle
θ
that the plank makes with the vertical in the equilibrium position. (Exclude the case
θ
=0.)
Answer
1
Shreya Choudhary
Subject: Physics
, asked on 18/1/18
Solve this:
A cubical block of wood of edge 3 cm floats in water. The lower surface of the cube just touches the free end of a vertical springs fixed at the bottom of the pot. Find the maximum weight that can be put in the block without wetting it. Density of wood = 800 kg m
-3
and spring constant of the spring = 50 N m
-1
. Take g = ms
-2
.
Answer
1
Naga Nandhini
Subject: Physics
, asked on 18/1/18
during blood transfusion the needle is inserted in the vein where the gauge pressure is 200Pa.At what height must the blood container be placed so that blood may enter the vein?
Answer
1
Naga Nandhini
Subject: Physics
, asked on 18/1/18
what shd b the avrage velocity of water in a tube of diameter 0.4cm so that the flow is laminar b)turbulent. the viscosity of water is 10
-3
Nm/2
Answer
1
Ruba Balu
Subject: Physics
, asked on 14/1/18
Why are dirty clothes usually cleaned in hot water mixed in detergent?
Answer
1
Ruba Balu
Subject: Physics
, asked on 14/1/18
When we try to close a water tap with our fingers, fast jets of water gush through the opening between our fingers. Why?
Answer
1
Ruba Balu
Subject: Physics
, asked on 14/1/18
Q. The neck and the bottom ot a bottle are 2 cm and 20 cm in diameter respectively. If the cork is pressed
with a force of 1.2 kgf in the neck of the bottle, calculate the force exerted on the bottom of the bottle.
Answer
1
Ruba Balu
Subject: Physics
, asked on 14/1/18
The 8th que. What is meant by mechanical advantage is 150/2 i didnt get that step. Pls explain .
Answer
2
Ruba Balu
Subject: Physics
, asked on 14/1/18
If the water pressure gauge shows a pressure at the ground floor to be 270 kilo Pascal, how high would water rise in the pipes of a building?
Answer
1
Alok Singh
Subject: Physics
, asked on 13/1/18
two soap bubbles in vacuum under isothermal condition of radius 2 cm and 4 cm respectively join together to form a single bubble. what is the radius of the new bubble?
Answer
1
Alok Singh
Subject: Physics
, asked on 13/1/18
define stoke law and derive an expression for stoke law?
Answer
1
Alok Singh
Subject: Physics
, asked on 13/1/18
draw the graph between velocity of a small sphere dropped from rest into a viscous liquid against time?
Answer
1
Yayati
Subject: Physics
, asked on 10/1/18
Solve this:
E
3
.
A
n
o
i
l
d
r
o
p
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a
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i
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a
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v
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c
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t
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f
5
×
10
-
1
r
n
/
s
.
(
i
)
t
h
e
r
a
d
i
u
s
o
f
t
h
e
d
r
o
p
w
i
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l
b
e
:
(
A
)
2
.
5
×
10
-
1
m
(
B
)
2
.
10
×
10
-
6
m
C
3
.
14
×
10
-
6
m
(
D
)
4
.
18
×
10
-
6
m
(
i
i
)
t
h
e
t
e
r
m
i
n
a
l
v
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l
o
c
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t
y
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f
a
d
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o
f
h
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f
o
f
t
h
i
s
r
a
d
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s
w
i
l
l
b
e
:
(
V
i
s
cos
i
t
y
o
f
a
i
r
=
1
.
8
×
10
-
5
N
-
s
/
m
2
d
e
n
s
i
t
y
O
f
O
i
l
=
900
K
g
/
r
n
3
.
N
e
g
l
e
c
t
d
e
n
s
i
t
y
o
f
a
i
r
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h
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t
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f
o
i
l
)
(
A
)
3
.
25
×
10
-
4
m
/
s
(
B
)
2
.
10
x
10
-
4
m
/
s
(
C
)
1
.
5
×
10
-
4
m
/
s
(
D
)
1
.
25
×
10
-
4
m
/
s
Answer
1
Yayati
Subject: Physics
, asked on 10/1/18
Solve This:
E
11
.
C
a
l
c
u
l
a
t
e
t
h
e
t
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0
.
8
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10
.
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p
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9
Answer
1
Yayati
Subject: Physics
, asked on 10/1/18
Two hail stones with radii in the ratio 1:2 fall from a great height through the atmosphere . Then the ratio of their momenta after they have attained terminal velocity is...
Answer
1
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What are you looking for?
A wooden plank of length 1 m and uniform cross section hinged at one end to the bottom of a tank as shown in figure (13-W5). The tank is filled with water up to a height of m. The specific gravity of the plank is 0.5m. Find the angle that the plank makes with the vertical in the equilibrium position. (Exclude the case =0.)
A cubical block of wood of edge 3 cm floats in water. The lower surface of the cube just touches the free end of a vertical springs fixed at the bottom of the pot. Find the maximum weight that can be put in the block without wetting it. Density of wood = 800 kg m-3 and spring constant of the spring = 50 N m-1 . Take g = ms-2.
with a force of 1.2 kgf in the neck of the bottle, calculate the force exerted on the bottom of the bottle.