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Arpita Dua
Subject: Physics
, asked on 19/2/18
Q. Three masses of 10 kg, 20 kg and 30 kg are placed at the vertices of an equilateral triangle of side 1m. Find the gravitational potential energy of this system.
Answer
2
Amitesh Kumar
Subject: Physics
, asked on 14/2/18
The U-tube shown has a uniform cross-section. A liquid is filled in the two arms up to heights
h
l
and
h
2
, and then the liquid is allowed to move.
Neglect viscosity and surface tension. When the levels equalize in the two arms, the liquid will :
(A) be at rest
(B) be moving with an acceleration of
g
h
1
-
h
2
h
1
+
h
2
+
h
(C) be moving with a velocity of
h
1
-
h
2
g
2
h
1
+
h
2
+
h
(D) exert a net force to the right on the tube
Answer
1
Drishti
Subject: Physics
, asked on 14/2/18
Explain the working of hydraulic brakes?
Answer
1
Swati Singh
Subject: Physics
, asked on 11/2/18
Define cohesive and adhesive forces. What is angle of contact? Why mercury doesn't wet the glass?
Answer
2
Hermoine
Subject: Physics
, asked on 10/2/18
Pls help q18 thank u Meritnation and answer is 9
Answer
1
Hermoine
Subject: Physics
, asked on 10/2/18
On the moon (where gravity is 1/6
th
of the Earth) there is a bucket of water kept on the s grand surface, filled till height H= 4m and a small hole is drilled so the water ejected out falls on the ground at maximum distance from the bucket Then the maximum range R is ?
Answer
1
Hermoine
Subject: Physics
, asked on 9/2/18
Please help
Q.13. A small metallic ball is in a liquid filled in a closed container shown. Initially ball is rest with respect container. Now the container is accelerated with an acceleration 2
m
/
s
2
towards right. The density of the ball is thrice that of the liquid. Find the time (in seconds) after which the ball will collide with the wall of the container: (neglect viscous forces and assume the floor of the container to be smooth)
Ans. 3 sec
Answer
1
Hermoine
Subject: Physics
, asked on 9/2/18
And is BCD,I didn't get option C please help
Q.11 Pressure difference between the top and bottom surface of the liquid placed in a cylindrical which is accelerating downwards with constant acceleration a is
(
A
)
ρ
g
-
a
h
(
B
)
ρ
g
-
a
h
i
f
a
<
g
(
C
)
Z
e
r
o
i
f
a
>
g
(
D
)
Z
e
r
o
i
f
a
=
g
Answer
1
Hermoine
Subject: Physics
, asked on 9/2/18
Please please please explain each step in detail
Q.6.
The velocity of the liquid coming out of a small hole of a large vessel containing two different liquids of densities
2
ρ
a
n
d
ρ
as shown in figure is
(
A
)
6
g
h
(
B
)
2
g
h
(
C
)
2
2
g
h
(
D
)
g
h
Answer
1
Ian Colaco
Subject: Physics
, asked on 9/2/18
Prove that the velocity of efflux through an orifice is equal to the velocity attained by a freely falling body from the surface of the liquid to the orifice. Also find the horizontal range in terms of height. ( 5marks)
Answer
1
Sanchay Kasturey
Subject: Physics
, asked on 28/1/18
the temperature of air in a 900 m long tunnel varies linearly from 100k at one end to 900k at other end. if the speed of air at 400k is 360m/sthrn time taken by sound to cross the tunnel is k second find 2 k
Answer
2
Apsaraa
Subject: Physics
, asked on 22/1/18
pls answer.....why does water not stick to raincoats?
Answer
2
Vinamratha
Subject: Physics
, asked on 21/1/18
if the angle of contact is 60 degree . find the relation between Fc and Fa . which represents cohesive and adhesive force respectively
Answer
1
Amitesh Kumar
Subject: Physics
, asked on 19/1/18
Q. A small sphere from rest in viscous liquid. Due to friction, heat is produced. Find the relation between the rate of production of heat and the radius of the sphere at terminal velocity.
Answer
1
Shreya Choudhary
Subject: Physics
, asked on 19/1/18
A barometer kept in an elevator reads 76cm when it is at rest.If the elevator goes up with increasing speed the reading will be
Answer
2
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What are you looking for?
Q. Three masses of 10 kg, 20 kg and 30 kg are placed at the vertices of an equilateral triangle of side 1m. Find the gravitational potential energy of this system.
Neglect viscosity and surface tension. When the levels equalize in the two arms, the liquid will :
(A) be at rest
(B) be moving with an acceleration of
(C) be moving with a velocity of
(D) exert a net force to the right on the tube
Q.13. A small metallic ball is in a liquid filled in a closed container shown. Initially ball is rest with respect container. Now the container is accelerated with an acceleration 2 towards right. The density of the ball is thrice that of the liquid. Find the time (in seconds) after which the ball will collide with the wall of the container: (neglect viscous forces and assume the floor of the container to be smooth)
Ans. 3 sec
Q.6. The velocity of the liquid coming out of a small hole of a large vessel containing two different liquids of densities as shown in figure is
Q. A small sphere from rest in viscous liquid. Due to friction, heat is produced. Find the relation between the rate of production of heat and the radius of the sphere at terminal velocity.