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Ans 1:
Class : Class 9
the answer must be C . this is because fat in the form of cholestrol gets collected in the blood vessels owing to chances of heart attack
Ans 4:
Class : Class 7
answer can be correct but loss of minerals and vitamins also causes blood vessels to make blood vessels not that strong and to carry less blood so b and c both are correct
Ans 6:
Class : Class 6
I HAVE WON THE FIRST GOLD MEDAL IN SCIENCE OLYMPIAD 1st LEVEL AND I HAVE A MERIT CERTIFICATE AND PARTICIPATION CERTIFICATE IN 2nd LEVEL.........I AM HAPPY..............
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Ans 1:
Class : Class 9
option {D} :-no gravitation, no normal reaction. hence there is no net force on the man
Ans 2:
Class : Class 9
As there is attractive force of earth that is there is no gravitation force.
So it will be just as the condition
Of space. Therefore he will fly.
Ans 4:
Class : Class 10
BUt in the question, as it is written, that there is no earth rotation to be considered, then from newton's first law of motion(intertia), the man will remain stationary. I have confirmed from other sources also.
Ans 5:
Class : Class 10
let me explain. There some things to consider- the friction on ground, the air resistance(negligible), rotation of earth(Centrifugal force as the man is in non inertial frame) and gravitational force.As soon as the gravity disappears, there are only three force- air(negligible, friction, and earths rotation. Because of his inertia due to being in under constant action of centrifugal force, he will fly out tangentially
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