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Dhruvik Tandel
Subject: Physics
, asked on 12/3/18
state and explain princple of moments of rotational eqiulibrium
Answer
1
Naga Nandhini
Subject: Physics
, asked on 9/3/18
26. (i) Give the expressions for the gravitational force exerted by the earth on a point mass m located above, below and on the surface of earth. Hence, deduce the expression for g on earth's surface.
(ii) Two uniform solid spheres of radii R and 2R are at rest with their spheres touching. Determine the gravitational force of attraction between them, if the density of spheres be p.
OR
i) Deduce an expression for the obital velocity of a satellite in the orbit. Reduce into an orbit close to the surface of the earth. How is it related to escape velocity?
ii) Determine the gravitational pull between a sphere of mass M and a uniform rod of length L and mass m as shown in the figure given below:-
Answer
1
Naga Nandhini
Subject: Physics
, asked on 9/3/18
(ii) Two uniform solid spheres of radii R and 2 R are at rest with their spheres touching. Determine the gravitational force of attraction between them, if the density of spheres be ρ.
Answer
1
Naga Nandhini
Subject: Physics
, asked on 9/3/18
Dear Sir, You've not explained the answer! Actually I had the solution but I asked it coz I didnt udnerstand,and seems the same solution's been repeated.So..can you tell me why for minimum they have multiplied root gr with 5? and also explain the 3rd part of question.Sir refer my question
Answer
1
Naga Nandhini
Subject: Physics
, asked on 9/3/18
Dear Experts ,
Please solve the following question -
Answer
1
Mitali
Subject: Physics
, asked on 4/3/18
What is the relation between height H and depth D for the same change in g?
Answer
1
Yagyam Aggarwal
Subject: Physics
, asked on 4/3/18
Pls answer 18 question
Q.18. A particle is projected vertically upward with velocity
2
G
M
3
R
from the surface of the earth. The maximum height attained by it is
(1) 3 R
(2)
R
2
(3) 2 R
(4)
R
3
Answer
1
Yagyam Aggarwal
Subject: Physics
, asked on 4/3/18
A solid sphere of mas
M
and radius
R
is placed in vacuum. The gravitational field at point
P
at distance
r
(
r
>
R
) from the centre is
E
. If a concentric spherical section of radius
R
2
is removed from the bigger sphere. Then net gravitational field at point P is
(1)
E
4
(2)
E
2
(3)
7
E
8
(4)
E
8
Answer
1
Yagyam Aggarwal
Subject: Physics
, asked on 1/3/18
Pls answer 17th Q
Q.17. A solid sphere of mass M and radius R is placed in vacuum. The gravitational field at point P at distance r (r > R) from the center is E. If a concentric spherical section of radius
R
2
is removed from the bigger sphere. Then net gravitational field at point P is
(1)
E
4
(2)
E
2
(3)
7
E
8
(4)
E
8
Answer
1
Ian Colaco
Subject: Physics
, asked on 28/2/18
How does the air friction increase the velocity of satellite.
Answer
1
Ishika Sahay
Subject: Physics
, asked on 28/2/18
Sunita, a Science student, was coming from school to her home. On the way she saw prayers were being done at various place. From Yamuna bridge she saw many people were taking dip in the Yamuna river. When she reached home, she was hungry. She asked her mother to give food, but she refused syaing solar eclipse is occurring and would not cook food till eclipse get over. When she tried to take milk, she found Tulsi leaves in it. Mother again disallowed her to eat or drink anything till the eclipse is completed. She tried to perceive her mother that solar and lunar eclipse are the natural phenomenon and has no ill effect on anyone. But she was not ready to listen anything and advised her not to be unorthodox. She became frustrated and felt embrassed at the superstitions of people and went to study.
a. What are the values shown by Sunit?
b. Time period of a planet around the Sun is 11.6 years. How far is the planet from Sun? The distance between Sun and earth is 1.5x10
8
km.
Answer
1
Ian Colaco
Subject: Physics
, asked on 27/2/18
what is the ratio of SI to CGS unit of acceleration?
Answer
1
Kunal Singh
Subject: Physics
, asked on 24/2/18
plz answer q 9 asap
Q.9. Two tuning forks A and B, when sounded together they produce 25 beats in 5 sec. On filing a tuning fork A, the no. of beats become 3 beats/ sec. Calculate the frequency of B if the frequency of A is 512 Hz.
Answer
1
Chaitanya
Subject: Physics
, asked on 23/2/18
Pls answer this
Q 16 If earth shrinks such that it density becomes 8 times what would be the new duration of day ?
Pls Pls answer this
Answer
1
Kunal Singh
Subject: Physics
, asked on 23/2/18
Q.15. A planet of mass M is moving along a circular orbit around the sun with velocity 32.9 km/s. What is the period of revolution of this planet around the sun?
Answer
2
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What are you looking for?
(ii) Two uniform solid spheres of radii R and 2R are at rest with their spheres touching. Determine the gravitational force of attraction between them, if the density of spheres be p.
OR
i) Deduce an expression for the obital velocity of a satellite in the orbit. Reduce into an orbit close to the surface of the earth. How is it related to escape velocity?
ii) Determine the gravitational pull between a sphere of mass M and a uniform rod of length L and mass m as shown in the figure given below:-
Please solve the following question -
Q.18. A particle is projected vertically upward with velocity from the surface of the earth. The maximum height attained by it is
(1) 3 R
(2)
(3) 2 R
(4)
(1) (2) (3) (4)
Q.17. A solid sphere of mass M and radius R is placed in vacuum. The gravitational field at point P at distance r (r > R) from the center is E. If a concentric spherical section of radius is removed from the bigger sphere. Then net gravitational field at point P is
(1)
(2)
(3)
(4)
a. What are the values shown by Sunit?
b. Time period of a planet around the Sun is 11.6 years. How far is the planet from Sun? The distance between Sun and earth is 1.5x108 km.
Q.9. Two tuning forks A and B, when sounded together they produce 25 beats in 5 sec. On filing a tuning fork A, the no. of beats become 3 beats/ sec. Calculate the frequency of B if the frequency of A is 512 Hz.
Q 16 If earth shrinks such that it density becomes 8 times what would be the new duration of day ? Pls Pls answer this