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Naga Nandhini
Subject: Physics
, asked on 5/3/18
A wire is stretched 1mm by a force of 1kN.a) How far would a wire of the same length but of 4 times the diameter be stretched by the same force ? b)how much work is done in stretching each wire?
NO LINKS!
Answer
1
Yagyam Aggarwal
Subject: Physics
, asked on 4/3/18
19) The length of a metal wire is l
1
when the tension in it is T
1
and is l
2
when the tension is T
2
. The natural length of the wire.
(
1
)
l
1
+
l
2
2
(
2
)
l
1
l
2
(
3
)
l
1
T
2
-
l
2
T
1
T
2
-
T
1
(
4
)
l
1
T
2
+
l
2
T
1
T
2
+
T
1
Answer
1
Ian Colaco
Subject: Physics
, asked on 28/2/18
Define surface energy and establish its relation with surface tension.
Answer
1
Ian Colaco
Subject: Physics
, asked on 27/2/18
A steel wire of length 4m and diameter 5mm is stretched by 5kg-wt. Find the increase in its length, if the young's modulus of steel wire is 2.4 * 10^12 dyne cm^-2. (3 marks)
Answer
1
Mudra
Subject: Physics
, asked on 25/2/18
Q7 plz
Answer
1
Ian Colaco
Subject: Physics
, asked on 24/2/18
define coefficient of friction, angle of friction and angle of repose and show how they are related to each other.
Answer
1
Arpita Dua
Subject: Physics
, asked on 19/2/18
Solve this:
Q.12. The x and y coordinate in the trajectory of a projectile as function of t are given by x = 6t and y =
8
t
-
5
t
2
where x, and y in metres and t in sec.
Find (i) speed of projection
(ii) maximum height attained and
(iii) the horizontal range (take g = 10
m
/
s
e
c
2
)
Answer
1
Manveen Kaur
Subject: Physics
, asked on 14/2/18
Solve question 11 with full solution
Answer
2
Malika Sood
Subject: Physics
, asked on 12/2/18
why is potential energy neglected in venturimeter?
Answer
1
Alwy
Subject: Physics
, asked on 6/2/18
Explain stress strain relationship of a metallic wire along with the help of a graph
Answer
1
Hermoine
Subject: Physics
, asked on 6/2/18
Q9and Q10
Q9. The elastic deformation energy of water at a depth 1 km is [ take P
w
=10
3
kgm
–3
, g = 9.8 ms
–2
, Bulk modulus of water =
B
= 2 × 10
9
Nm
–2
] in J/m
3
a) 2.4 × 10
4
b) 3.6 × 10
3
c) 3.6 × 10
4
d) 0.8 × 10
5
Q10. A block of mass 100 kg hangs on three vertical wires of equal length arranged symmetrically. The middle wire is of steel and the other two are of copper. Taking Y = 2Y, the tension in the wire wires are (in kg force)
a)
100
3
,
100
3
,
100
3
b) 25, 50, 25 c) 20, 60, 20 d) 10, 80, 10
Answer
1
Hermoine
Subject: Physics
, asked on 5/2/18
Q.63. Find the depth of a lake at which the density of water is 1% greater than at the surface, if compressibility of water is
50
×
10
-
6
/
a
t
m
.
(a) 1 km
(b) 2 km
(c) 1.5 km
(d) 0.5 km
Answer
1
Hermoine
Subject: Physics
, asked on 4/2/18
Please explain each option
Q. A body of mass m is attached to the lower end of a metal wire whose upper end is fixed the elongation of the wire i
l
. Find the incorrect statement.
a) Loss in gravitational potential energy of m i mg l
b) The elastic potential energy stored in the wire is mg
l
.
c) The resorting force is not a constant
d) Heat produced in
1
2
mg
l
Answer
1
Hermoine
Subject: Physics
, asked on 4/2/18
Please help asap
Answer
1
Hermoine
Subject: Physics
, asked on 4/2/18
Pleade help and explain with steps
Answer
1
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NO LINKS!
Q.12. The x and y coordinate in the trajectory of a projectile as function of t are given by x = 6t and y = where x, and y in metres and t in sec.
Find (i) speed of projection
(ii) maximum height attained and
(iii) the horizontal range (take g = 10 )
Q9. The elastic deformation energy of water at a depth 1 km is [ take Pw =103 kgm–3, g = 9.8 ms–2, Bulk modulus of water = B = 2 × 109 Nm–2] in J/m3
a) 2.4 × 104 b) 3.6 × 103 c) 3.6 × 104 d) 0.8 × 105
Q10. A block of mass 100 kg hangs on three vertical wires of equal length arranged symmetrically. The middle wire is of steel and the other two are of copper. Taking Y = 2Y, the tension in the wire wires are (in kg force)
a) b) 25, 50, 25 c) 20, 60, 20 d) 10, 80, 10
(a) 1 km
(b) 2 km
(c) 1.5 km
(d) 0.5 km
Q. A body of mass m is attached to the lower end of a metal wire whose upper end is fixed the elongation of the wire i l . Find the incorrect statement.
a) Loss in gravitational potential energy of m i mg l
b) The elastic potential energy stored in the wire is mg l.
c) The resorting force is not a constant
d) Heat produced in mg l