A. increasing focal length of the lens
B. Decreasing focal length of the lens
C. Lens of large aperture
D. lens of short aperture
E. None of these
A. 62
B. 73
C. 79
D.53
A. Cerebrum
B. Cerebellum
C. Thalamus
D. Medulla oblongata
Water is a highly effective coolant for a car engine because _________?
A. Water is good conductor of heat
B. Water has very high specific heat capacity
C. Water boils at a comparatively high temperature
D. Evaporation of water produces lot of cooling
A. Prometaphase
B. Telophase
C. Prophase
D. Metaphase
A. Audiosonic
B. Infrasonic
C. Ultrasonic
D. Supersonic
Sounds with frequencies below 20 hertz are called infrasound. Infrasound is too low-pitched for humans to hear. Sounds with frequencies above 20,000 hertz are called ultrasound.
The good sources of Vitamin-A are?
A. green leafy vegetables
B. seeds
C. fresh vegetables and fruits
D. sea foods