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Arshia Sharma
Subject: Physics
, asked on 28/11/17
Solve this:
Answer
1
Arshia Sharma
Subject: Physics
, asked on 28/11/17
Solve this:
Answer
1
Nura Mohammad
Subject: Physics
, asked on 26/11/17
?Q11.) What is meant by P???in a stretched wire? find a relation for it and also determine the elastic P.?????per unit vol of the wire .
?
In step one why r we taking the av. Force even when initial force is 0 and in the last step where has vol gone . It shud be 1/2 youngs mod stain^2 vol ryt?
Answer
1
Sandhya Karthik
Subject: Physics
, asked on 19/11/17
a u tube with limbs of diameter 1 cm and 0.4 cm conttains water of surface tension 7.0*10^-2 n/m angle of contact 0deg and density 1.0*10^3 kg m^-3 find difference in levels.
take g=10 m/s^2
Answer
1
Sandhya Karthik
Subject: Physics
, asked on 19/11/17
a mercury barometer tube is 4 mm in diameter compute error in reading due to surface tension of mercury density of mercury=13.6*10^3 kg/m^-3 angle of contact =130 surface tension=490*10^-3 n/m
Answer
1
Sandhya Karthik
Subject: Physics
, asked on 19/11/17
2 glass capillary tubes of 1mm radius are put in mercury and water.
compare liquid levels of the 2 tubes sp gr=13.6 surface tension of water=73*10^-3 n/m surface tension of mercury=473*10^-3 n/m and angle of contact 139 deg
Answer
1
Sandhya Karthik
Subject: Physics
, asked on 19/11/17
what is the radius oof the capillary tube so that water may rise up to a height of 8 cm in it. surface tension of water 7.0*10^-2 n/m g=9.8 m/s^2
Answer
1
Sandhya Karthik
Subject: Physics
, asked on 19/11/17
pressure of air in a soap bubble of 8 mm diameter is 1 cm of water above atm pressure calculate surface tension of soap solution when g=10 m/s^2
Answer
1
Sandhya Karthik
Subject: Physics
, asked on 19/11/17
2. find amt of work done in breaking a drop of petrol of radius 1 mm into a 1000 million drops if surface tension of petrol is 2.6*10^-2 n/m
Answer
1
Tulsi Mehta
Subject: Physics
, asked on 19/11/17
When do we use P=F/A and when do we use P= h rho g
Answer
1
Tulsi Mehta
Subject: Physics
, asked on 15/11/17
symbol for denoting longitudinal strain is called?
Answer
1
Ruba Balu
Subject: Physics
, asked on 11/11/17
22
Q22. A steel wire of diameter 2 mm has a breaking strength of 4 × 10
5
N. What is the breaking strength of similar wire of diameter 1 mm? ( Ans : 10
5
N)
Hint : Strength , F = breaking stress x area, breaking stress being constant F
∝
d
4
, F
2
= F
1
× 1/4.
Answer
1
Ruba Balu
Subject: Physics
, asked on 11/11/17
21
21. The length of a wire increases by 8 mm when a weight of 5 kg is hung. If the conditions are same, but the radius is doubled, what will be the increase in length? (ans : 2 mm )
Answer
1
Ruba Balu
Subject: Physics
, asked on 11/11/17
20
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Answer
1
Ruba Balu
Subject: Physics
, asked on 11/11/17
19th
Q19. What force is required to stretch a steel wire 1 cm
2
in cross section to double its length. Y = 2x 10
11
N/m
2
. (Ans : 2x 10
10
N)
Answer
1
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What are you looking for?
?
In step one why r we taking the av. Force even when initial force is 0 and in the last step where has vol gone . It shud be 1/2 youngs mod stain^2 vol ryt?
take g=10 m/s^2
compare liquid levels of the 2 tubes sp gr=13.6 surface tension of water=73*10^-3 n/m surface tension of mercury=473*10^-3 n/m and angle of contact 139 deg
Q22. A steel wire of diameter 2 mm has a breaking strength of 4 × 105 N. What is the breaking strength of similar wire of diameter 1 mm? ( Ans : 105 N)
Hint : Strength , F = breaking stress x area, breaking stress being constant F d4 , F2 = F1 × 1/4.
21. The length of a wire increases by 8 mm when a weight of 5 kg is hung. If the conditions are same, but the radius is doubled, what will be the increase in length? (ans : 2 mm )
Q19. What force is required to stretch a steel wire 1 cm2 in cross section to double its length. Y = 2x 1011 N/m2. (Ans : 2x 1010 N)