The reason we are not crushed under the weight of air is that the pressure inside our body is also equal to the atmospheric pressure and cancels the pressure being exerted from outside.
The force required to put an object into motion is 10 N. When another object is placed over the surface of the first, the same 10 N force can put them into motion.
The approximate value of speed of sound in glass is ____ m/s.
When electric current is passed through water containing acid, ____ gases are produced.
A) hydrogen and oxygen
B) hydrogen and ozone
C) oxygen and hydrogen peroxide
D) hydrogen peroxide and ozone
The dome shaped impervious rock in which the natural gas collects at high pressure above petroleum is called ____.
A) rock dome
B) oil cap
C) cap rock
D) rock trap
L.P.G stands for ____.
A) liquid petroleum gas
B) liquefied petroleum gas
C) liquid petrol gas
D) liquefied petrol gas
The pollutant ____ present in air prevents haemoglobin molecules from carrying oxygen to body cells.
Tuberculosis is quite common among the people living in ____.
A) hygienic areas
B) unhygienic areas
C) isolated villages
D) deep forest areas
Cheek cells have large spherical vacuoles.
The period of life, when the body undergoes changes leading to reproductive maturity is called ____.