1. How an ant can see the objects all round?
It is due to the presence of compound eyes, one on each side
of the head. Each eye consists of tiny lenses set close
together. The number of lenses varies from fewer than 6 to
more than 1,000
2. What is the approximate time required for a heart beat?
72 heartbeats/60 sec so 1 heartbeat 1.2 sec
3. Due to which the energy emitted by the Sun?
its due to nuclear fusion no fission, two hydrogen nucliii
combine to form a single nucleus of Helium
Because of scattering of light
It converts the mechanical energy in to electrical energy
7. What is the chemical name for Baking Soda?
Sodium Bicaronate
8. Which the base of quartz crystal working in the watch?
Piezo electric effect
9. Why does a big fire in the open appear to be fanned by strong winds?
The surrounding heated air rises and cool air rushes in to
create a fanning effect
10. How the Oil rises up the wick in a lamp?
It is because of the capillary action phenomenon
13. By polymerization of which, PVC is obtained?
Vinyl Chloride
17. How Potassium permanganate is use for purifying drinking water?
Because it is an oxidizing agent
18. What is female sex hormone?
Oestrogen is the female sex hormone
19. WHICH FORCE IS RESPONSIBLE FOR REVOLVING THE PLNAT AROUND THE SUN?
centrifugal force
when a solar system is taken in to consideration
the gravitational force acts as a centripetal force towards
the center.
on other side equal amount of centrifugal force will be
present which helps the planet to revolve round the earth.
20. Who is first ethinc Indian women in space?
Kalpana Chawla
21. Who is first Muslim president of India?
apj abdul kalam
22. RATIO IN OF WBC AND RBC IN BLOOD?
1:700-normal
1:1000-in peripheral blood
workdone will be zero (0) beacuse total displacement is
zero. wee know that workdone=force * dicplacement
24. Which is the heaviest body of our solar system.
a)Sun
b)Uranus
c)Jupiter
d)Saturn
JUPITER with a mass 318 times that of the Earth.
