The process whereby the molecules of different substances move randomly is called?
capillarity
surface tension
osmosis
diffusion
Correct answer is D
No explanation has been provided for this answer.
100N
620N
50N
310N
Correct answer is A
For anybody falling through a viscous liquid, at its terminal velocity. the resultant force acting on its is zero. from the equation: Mg - v - u = 0. where v = viscous drag
U = upthrust Mg = weight of the body.
∴ 36 x 10 - 260 - U = 0
∴ U = 360 - 260 = 100N
Upthrust on the body = 100N.
165kgm-3
100kgm-3
265kgm-3
350kgm-3
Correct answer is A
For liquid W, its mass = vol. x density = 3 x 200 =600kg.
similarly, for liquid L, its mass = 7 x 150 = 1050kg
∴ Total mass of mixture = 600kg + 1050kg =1650kg.
similarly total vol.of the mixture = 3m3 + 7m3 =10m3.
∴ density of the mixture = (Total Mass)/Total Mixture = (1650kg)/10m3
=165kgm-3
it is about to rain
the relative humidity is high
there is plenty of sunshine
the relative humidity is low
Correct answer is D
No explanation has been provided for this answer.
which of the following materials is a conductor?
Glass
Wax
Sodium
Plastic
Correct answer is C
No explanation has been provided for this answer.