Physics
Magnifying Glass is basically a

Plano-concave lens
Convex lens
Cylindrical lens
Concave lens

ANSWER DOWNLOAD EXAMIANS APP

Physics
Specific gravity is defined as the ratio of

Density of the substance to the density of water
Density of the substance to the density of water at 4°C
Density of water at 4°C to the density of the substance
Density of the substance to the density of water at 0°C

ANSWER DOWNLOAD EXAMIANS APP