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Yashi Mishra
Subject: Physics
, asked on 20/5/18
Correct answer is 3. Solve the question showing all the steps
Q12. A piece of wax wieghs 18.03 g in air. A piece of metal is found to weigh 17.3 g in water. It is tied to the wax and both together weigh 15.23 g in water. Then, the specific gravity of wax is
1
18
·
03
17
·
03
2
17
·
03
18
·
03
3
18
·
03
19
·
83
4
15
·
03
17
·
03
Answer
1
Yashi Mishra
Subject: Physics
, asked on 20/5/18
Correct answer is 1. Solve the question showing all the steps
Q.1. The atmospheric pressure at a place is
10
5
Pa. If tribromomethane (specific gravity = 2.9) be employed as the barometric liquid, the barometric height is
(1) 3.52 m
(2) 1.52 m
(3) 4.52 m
(4) 2.52 m
Answer
1
Yashi Mishra
Subject: Physics
, asked on 19/5/18
correct answer is 1. solve showing all steps
Q.9. A massless inextensible string in the form of a loop is placed on a horizontal film of soap solution of surface tension T. If film is pierced inside the loop and it convert into a circular loop of diameter d, then the tension produced in string is
(1) Td
(2)
π
Td
(3)
πd
2
T
(4)
πd
2
T
4
Answer
1
Yashi Mishra
Subject: Physics
, asked on 18/5/18
Solve the question showing all the steps
5.
If value of acceleration due to gravity at a place decreases by 3% then find the change in the height of mercury in a barometer at that place.
Answer
1
Surbhi Singh
Subject: Physics
, asked on 7/5/18
pls answer 19th and 20th ques:
19. A barometer tube reads 75 cm of Hg. If tube is gradually inclined at an angle of 30
o
with horizontal keeping the open and in the mercury container, then find the length of mercury column in the barometer tube.
(1) 86.7 cm
(2) 150 cm
(3) 75 cm
(4) 92.5 cm
20. A metallic sphere weighing 3 kg in air is held by a string so as to be completely immersed in a liquid of relative density 0.8. The relative density of metallic is 10. The tension in the string is.
(1) 18.7N
(2) 42.5N
(3) 32.7N
(4) 27.6N
Answer
1
Surbhi Singh
Subject: Physics
, asked on 7/5/18
pls answer the 14th ques:
14. A cubical block is floating in a liquid with one fourth of its volume immersed in the liquid, If whole of the system accelerates upward with acceleration g/4, the fraction of volume immersed in the liquid will be
(1) 1/4 (2) 1/2
(3) 3/4 (4) 2/3
Answer
1
Haripriya
Subject: Physics
, asked on 7/5/18
How does a pipette work?
Answer
2
Prithesh Dwivedi
Subject: Physics
, asked on 3/5/18
pls solve Qno.2
Q.2. A cubical container with side 2 m has a small hole with a cap at point C as shown. The water level is upto point D. (BC = 0.5 m and BD = 1.5 m). If container is given an acceleration of 8 m/
s
2
and the hole is opened simultaneously. What will be the amount of water that will spill out of the container?
Answer
1
Amitesh Kumar
Subject: Physics
, asked on 14/4/18
A water barrel stands on a table of height
h
. If a small hole is punched in the side of the barrel at its base, it is found that the resultant stream of water strikes the ground at a horizontal distance
R
from the table. What is the depth of water in the barrel?
(1)
R
2
h
(2)
R
2
2
h
(3)
R
2
4
h
(4)
4
R
2
h
Answer
1
Hermoine
Subject: Physics
, asked on 7/4/18
↵
how to decide the driving force in SHM.Like for example in this question, what is the deciding factor
A cylindrical object of outer diameter 20 cm and mass 2 kg floats in water with its axis vertical. If it is slightly depressed and then released, find the time period of the resulting simple harmonic motion of the object.
Answer
1
Jeneeta Eliza John
Subject: Physics
, asked on 7/4/18
Why is the dimensions of pressure head equal to the dimensions of length when pressure head is pressure per unit volume?
Answer
1
Rajarshi Das
Subject: Physics
, asked on 4/4/18
relation between surface tension and surface energy
Answer
1
Rajarshi Das
Subject: Physics
, asked on 31/3/18
what is Bernoulli's theorem and what are its applications?
Answer
1
Shreya Choudhary
Subject: Physics
, asked on 30/3/18
Solve this :
31
.
A
large
tank
is
filled
with
water
to
height
H
.
A
small
hole
is
made
at
the
base
of
the
tank
.
It
takes
time
T
1
to
decrease
the
height
of
water
to
H
η
(
η
>
1
)
and
takes
time
T
2
to
take
out
rest
of
water
.
If
T
1
=
T
2
,
then
η
is
equal
to
:
(
a
)
2
(
b
)
3
(
3
)
4
(
d
)
2
2
Answer
1
Shreya Choudhary
Subject: Physics
, asked on 30/3/18
Solve this:
30. A closed rectangular vessel is completely filled with a liquid of density p. It moves horizontally with an acceleration a=g as shown. The value of pressure difference at point A and B is.
1
p
g
b
-
h
2
p
g
h
2
3
p
g
h
4
p
g
b
+
h
2
Answer
2
1
2
3
4
5
Next
What are you looking for?
Q12. A piece of wax wieghs 18.03 g in air. A piece of metal is found to weigh 17.3 g in water. It is tied to the wax and both together weigh 15.23 g in water. Then, the specific gravity of wax is
Q.1. The atmospheric pressure at a place is Pa. If tribromomethane (specific gravity = 2.9) be employed as the barometric liquid, the barometric height is
(1) 3.52 m
(2) 1.52 m
(3) 4.52 m
(4) 2.52 m
Q.9. A massless inextensible string in the form of a loop is placed on a horizontal film of soap solution of surface tension T. If film is pierced inside the loop and it convert into a circular loop of diameter d, then the tension produced in string is
(1) Td
(2) Td
(3)
(4)
5. If value of acceleration due to gravity at a place decreases by 3% then find the change in the height of mercury in a barometer at that place.
19. A barometer tube reads 75 cm of Hg. If tube is gradually inclined at an angle of 30o with horizontal keeping the open and in the mercury container, then find the length of mercury column in the barometer tube.
(1) 86.7 cm
(2) 150 cm
(3) 75 cm
(4) 92.5 cm
20. A metallic sphere weighing 3 kg in air is held by a string so as to be completely immersed in a liquid of relative density 0.8. The relative density of metallic is 10. The tension in the string is.
(1) 18.7N
(2) 42.5N
(3) 32.7N
(4) 27.6N
14. A cubical block is floating in a liquid with one fourth of its volume immersed in the liquid, If whole of the system accelerates upward with acceleration g/4, the fraction of volume immersed in the liquid will be
(1) 1/4 (2) 1/2
(3) 3/4 (4) 2/3
Q.2. A cubical container with side 2 m has a small hole with a cap at point C as shown. The water level is upto point D. (BC = 0.5 m and BD = 1.5 m). If container is given an acceleration of 8 m/ and the hole is opened simultaneously. What will be the amount of water that will spill out of the container?
(1) (2) (3) (4)
30. A closed rectangular vessel is completely filled with a liquid of density p. It moves horizontally with an acceleration a=g as shown. The value of pressure difference at point A and B is.