Which one of the following is a vector quantity?
Temperature gradient
Mass
Work
Time
Correct answer is A
Temperature gradient(Tg) = DT ÷ L = T2 – T1 ÷ L
i.e– it is the ratio of an increment in temperature to the length
Hence, Temperature gradient (Tg) has defined direction alongside with magnitude
And it is a vector quantity
Mass, work & Time are scalar quantity
The eyeball consists of a round tough white skin called
Sclerotic
Choroid coal
Optical fiber
Accommodation
Correct answer is A
Sclerotic coat (sclera) is the tough outer coat of the eye that coves the eyeball (ii) sclerotic coat is modified in front of the eye to from a transparent and horny window
Diffusion
Osmosis
Surface tension
Cohesion
Correct answer is B
No explanation has been provided for this answer.
A regular spacing or arrangement of atoms in a crystalline material is called
Orbit
Lattice
Atomic structure
Energy level
Correct answer is B
The regular arrangement of atoms in a crystalline materials is called LATTICES
Heat transfer by convection will take place in one the following substance
Stone
Wood
Mercury
Water
Correct answer is D
Convection take place commonly in liquids (water) and slightly in gasses