Options: the sun is between the moon and the earth, the earth is between the moon and the sun, the moon is between the sun and the earth, the moon does not lie on the line joining the sun and the earth
The significant shifts in Indian agriculture during green revolution include
Options: non-food grains reported some spectacular progress and shift in the cropping pattern, major food grains, in the eastern regions productions decreased and in the northern states increased, both (a) and (b), None of the above
Exposure to sunlight helps a person improve his health because
Options: the infrared light kills bacteria in the body, resistance power increases, the pigment cells in the skin get stimulated and produce a healthy tan, the ultraviolet rays convert skin oil into Vitamin D
Sound produced at a point is heard by a person after 5 second, while the same sound is heard by another person after 6 seconds. If the speed of sound is 300 m/s, what could be the maximum and minimum distances between the two persons?
Options: 1.8 km, 0.15 km, 2.2 km, 0.20 km, 2.8 km, 0.25 km, 3.3 km, 0.30 km