A geostationary satellite is orbiting the earth at a height of 5R above that surface of the earth, R being the radius of the earth. The time period of another satellite in hours at a […]
A spherical planet has a mass Mp and diameter Dp. A particle of mass m falling freely near the surface of this planet will experience an acceleration due to gravity, equal to
Options
The height at which the weight of a body becomes 1/16 th, its weight on the surface of earth (radius R), is
Options
(a) 5 R (b) 15 R (c) 3 R (d) 4 […]
which of the following compounds can be used as antifreeze in automobile radiators
Options
(a) Methyl alcohol (b) Glycol (c) Nitrophenol (d) Ethyl alcohol
Correct Answer:
Glycol
Explanation:
Glycol is widely used as an […]
Equal volumes of two monatomic gases,A and B at same temperature and pressure are mixed.The ratio of specific heats (C(p)/C(v)) of the mixture will be
Options
(a) 0.83 (b) 1.5 (c) 3.3 (d) […]
Deficiency of vitamine B₁ causes the disease
Options
(a) convulsions (b) beri-beri (c) cheilosis (d) sterility
Correct Answer:
beri-beri
Explanation:
Deficiency disease Vitamin
Convulsions B₆
Beri- beri B₁
Cheilosis B₂
Two sources of sound placed close to each other are emitting progressive waves given by y₁ = 4 sin 600 πt and y₂ = 5 sin 608 πt. An observer located near these two sources […]
When a string is divided into three segments of length l₁, l₂ and l₃ the fundamental frequencies of these three segments are v₁, v₂ and v₃ respectively. The original fundamental frequency (v) of the string […]
The potential energy of particle in a force field is U = A/r² – b/r, where A and B are positive constants and r is the distance of particle from the centre of the field. […]
An electric dipole of moment ‘p’ is placed in an electric field of intensity ‘E’. The dipole acquires a position such that the axis of the dipole makes an angle θ with the direction of […]
2017 Copyright Doctor Dreams Training Academy