NCERT Solutions
Board Paper Solutions
Ask & Answer
School Talk
Login
GET APP
Login
Create Account
Popular
Latest
Expert Answers
ALL
Harsh Sethi
Subject: Science
, asked on 4/1/18
The radius of solid gold sphere of 0.25 cm. If density of gold is 19.5g/cc. Calculate it's mass.
Plzz don't send any links!!!
Answer
1
Harsh Sethi
Subject: Science
, asked on 4/1/18
A rectangular block of iron of dimensions 10 cm*5 cm*2 cm is kept on a table top. Suggest the positions in which it should be placed on the table so as to exert (A) maximum (B) minimum pressure on the table top.
Plzz don't send any links!!!
Answer
1
Tanya Arora
Subject: Science
, asked on 3/1/18
Why is the weight of the body zero at the centre of the earth.
Answer
2
Tanya Arora
Subject: Science
, asked on 3/1/18
answer asap!!!
Q. An object is thrown vertically upwards and rises to a height of 20 m. Calculate (i) the velocity with which the object was thrown upwards (ii) the time taken by the object to reach the highest point (g = 10 m/s
2
)
Answer
1
Tanya Arora
Subject: Science
, asked on 3/1/18
kindly answer soon
A stone is dropped from the roof of building. It takes 4 s to reach the ground. Find the height of the building
( g = 9.8 m/s
2
).
Answer
1
Arravelli Chaitanya
Subject: Science
, asked on 2/1/18
If the
Earth
's gravity si higher than
Moon
's gravity, why isn't the
Moon
falling on
Earth
?
Answer
3
Pranav Jajoo
Subject: Science
, asked on 28/12/17
Suppose a planet exists whose mass and radius both are half those of earth .. Calculate the acceleration due to gravity on the surface of this planet ..
Pls answer fast ...
Answer
1
Chirag Aggarwal
Subject: Science
, asked on 22/12/17
A solid uniform ball having volume V and density p floats at the interface of two unmixible liquids. The density of the upper and the lower liquids are p1 and p2 respectively, such that p1<p<p2. What fraction of the volume of the ball will be in the lower liquid?
Answer
1
Admya Maini
Subject: Science
, asked on 21/12/17
Solve this:
9. The orbital velocity of an artificial satellite in a circular orbit just above the centre's surface is for a satellite orbiting at an altitude of half of the earth's radius, the orbital velocity is
(
A
)
3
v
/
2
(
B
)
3
/
2
v
(
C
)
2
/
3
v
(
D
)
2
/
3
v
Answer
2
Admya Maini
Subject: Science
, asked on 21/12/17
Solve this:
A closed compartment containing a gas is moving with some acceleration in horizontal direction. Neglect effect of gravity. Then the pressure in the compartment is
(A) same everywhere (B) lower in the front side
(C) lower in the rear side (D) higher in the upper side
Answer
1
Sanjay Charan
Subject: Science
, asked on 19/12/17
the weight of a book at the surface of the earth is 5N.what will be the weight if the same book at a height equal to the radius of the earth
Answer
1
Garima Srivastava
Subject: Science
, asked on 16/12/17
Which will have greater potential energy, a person standing on the first floor or a person standing on the second floor?
Answer
1
Admya Maini
Subject: Science
, asked on 16/12/17
The value of g at the earth's surface is 10 ms
–2
, the value of g at a height of 3
R
L
from the surface of earth is
n
10
. Find the value of '
n
'.
Answer
1
Admya Maini
Subject: Science
, asked on 16/12/17
Solve this:
Q. Two identical spheres of radii r each are placed touching each other. The gravitational force between them is F
G
. It is found that F
α
r
n
, where 'n' is ____________.
Answer
1
Keerthana Dileep
Subject: Science
, asked on 15/12/17
How to convert 100cm sq to meter sq ? Please explain with steps.
Answer
5
Prev
5
6
7
8
9
Next
What are you looking for?
Plzz don't send any links!!!
Plzz don't send any links!!!
Q. An object is thrown vertically upwards and rises to a height of 20 m. Calculate (i) the velocity with which the object was thrown upwards (ii) the time taken by the object to reach the highest point (g = 10 m/s2)
A stone is dropped from the roof of building. It takes 4 s to reach the ground. Find the height of the building
( g = 9.8 m/s2).
Pls answer fast ...
9. The orbital velocity of an artificial satellite in a circular orbit just above the centre's surface is for a satellite orbiting at an altitude of half of the earth's radius, the orbital velocity is
A closed compartment containing a gas is moving with some acceleration in horizontal direction. Neglect effect of gravity. Then the pressure in the compartment is
(A) same everywhere (B) lower in the front side
(C) lower in the rear side (D) higher in the upper side
Q. Two identical spheres of radii r each are placed touching each other. The gravitational force between them is FG. It is found that F rn, where 'n' is ____________.