411: Low temperatures (Cryogenics) find application in
(a) space travel, surgery and magnetic levitation
(b) surgery, magnetic levitation and telemetry
(c) space travel, surgery and telemetry
(d) space travel, magnetic levitation and telemetry
412: Despite being a high saving economy, capital formation may not result in significant increase in output due to
(a) weak administrative machinery
(b) illiteracy
(c) high population density
(d) high capital-output ratio
413: Hydroponics means:
(a) Cultivation of plants without the use of soil
(b) Detection of sound in water
(c) Animals living in water
(d) A Japanese way of flowering
414: Consider the volumes of the following:
1. A parallelepiped of length 5 cm, breadth 3 cm and height 4 cm
2. A cube of each side 4 cm
3. A cylinder of radius 3 cm and length 3 cm
4. A sphere of radius 3 cm
The volumes of these in the decreasing order is
(a) I, III, II, IV
(b) IV, II, III, I
(c) I, II, III, IV
(d) IV, III, II, I
415: The sun derives its energy from:
(a) Nuclear fission reactions.
(b) Nuclear fusion reactions.
(c) Oxidation of helium.
(d) Fission of noble metals.