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Shreya Bharti
Subject: Science
, asked on 8/4/18
Ans fast
8.
When a planet moves around the sun, its
(A) areal velocity is constant (B) linear velocity is constant
(C) angular velocity is constant (D) all the velocities are constant
9.
The orbital velocity of an artificial satellite in a circular orbit just above the centre's surface is v. 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
1
Atreya
Subject: Science
, asked on 31/3/18
4. Among the following, an example of rectilinear motion is :
a) A train moving on a straight bridge b) Swaying of a Tree
c) A child on a merry-go round d) The motion of a pendulum in a wall clock
Answer
1
Zaid Khan
Subject: Science
, asked on 16/3/18
2. Write the energy conversion that takes place in a hydropower plant.
Answer
3
Satwik Singh
Subject: Science
, asked on 16/3/18
In which pulley the effort applied acts against the force of gravity?
Answer
1
S.s.shri Darshini
Subject: Science
, asked on 16/3/18
for the energy conversion of energy in hydropower plant,
is it from kinetic energy to electric energy ?
Answer
4
Abhishek.s.nair
Subject: Science
, asked on 15/3/18
Do we need to byhart the biogas plant diagram for tomorrow’s science board exam?
Answer
4
Son Ser
Subject: Science
, asked on 15/3/18
Q. If x
°
C > y
°
C and a>b, then from the following table find out which fuel is cleaner?
Fuel
Ignition temperature
Calorific value
A
y
a
B
x
b
Answer
4
Champ Jee
Subject: Science
, asked on 15/3/18
Q 7.
Give two advantages and 2 disadvantages, each of renewable and non-renewable sources of energy.
Answer
1
Monty
Subject: Science
, asked on 15/3/18
Solar energy gets converted into which type of energy in solar cell?
Answer
4
Monty
Subject: Science
, asked on 15/3/18
Where does the wind energy farm situated in our country and how much electricity is produced by it. Which factors can be considerable while setting wind energy farm
Answer
3
Siddhi
Subject: Science
, asked on 15/3/18
Explain the use of concave mirror in solar concentrators
Answer
1
Abhishek
Subject: Science
, asked on 15/3/18
Question) What are various ways in which energy can be obtained due to nucleus reactions? Name the nuclear fuel in an atomic energy power plant. What are the limitations of nuclear energy power plant?
Answer
1
Abhishek
Subject: Science
, asked on 15/3/18
Question) How is energy produced in the sun? Give the appropriate reaction?
Answer
1
Ashutosh Saini
Subject: Science
, asked on 15/3/18
Which energy we can given by pressure cooker
Answer
3
Ashutosh Saini
Subject: Science
, asked on 15/3/18
Which energy we can given by steam
Answer
2
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What are you looking for?
8. When a planet moves around the sun, its
(A) areal velocity is constant (B) linear velocity is constant
(C) angular velocity is constant (D) all the velocities are constant
9. The orbital velocity of an artificial satellite in a circular orbit just above the centre's surface is v. For a satellite orbiting at an altitude of half of the earth's radius, the orbital velocity is
a) A train moving on a straight bridge b) Swaying of a Tree
c) A child on a merry-go round d) The motion of a pendulum in a wall clock
is it from kinetic energy to electric energy ?
Q. If xC > yC and a>b, then from the following table find out which fuel is cleaner?