The theory of Expanding Universe was first propounded by____________?
A. Einstein
B. Newton
C. Gahleo
D. Hubble
Water has maximum density at____________?
Water has maximum density at____________?
A. 0°C
B. 4°C
C. 4° K
D. 4.8°C
For being able to see three-dimensional pictures we have to use_________?
For being able to see three-dimensional pictures we have to use_________?
A. A binocular
B. A camera
C. An epidiascope
D. A stereoscope
A satellite moving round the earth with a uniform speed has____________?
A satellite moving round the earth with a uniform speed has____________?
A. An accelerated motion
B. No acceleration at all
C. Uniform acceleration
D. Uneven acceleration
Materials for rain-proof coats and tents owe their water proof properties to________?
Materials for rain-proof coats and tents owe their water proof properties to________?
A. Surface tension
B. Viscosity
C. Specific gravity
D. Elasticity
The absorption of ink by blotting paper involves__________?
The absorption of ink by blotting paper involves__________?
A. Viscosity of ink
B. Capillary action phenomenon
C. Diffusion of ink through the blotting
D. Siphon action
The average heartbeat per minute in a normal man is _________? A. 50
A. 50
B. 70 (correct)
C. 80
D. 100
Detergents dissolved in water help in cleaning clothes by_________?
Detergents dissolved in water help in cleaning clothes by_________?
A. Increasing the temperature of water
B. Reacting chemically with dirt
C. Reducing the surface tension of water
D. Dissolving dirt
The cracking sound heard when dry hair is combed with a hard rubber comb is due to_________?
The cracking sound heard when dry hair is combed with a hard rubber comb is due to_________?
A. The hair barging against the charged comb
B. Small electric sparks
C. The rubbing of the comb with the hair
D. None of the above
In order to prevent the corrosion of iron pipes they are often coated with a layer of zinc. This process is termed as____________?
In order to prevent the corrosion of iron pipes they are often coated with a layer of zinc. This process is termed as____________?
A. Electroplating
B. Annealing
C. Galvanization
D. Vulcanization