Denne the term parallax.
state two ways of reducing parallax when using a metre rule to determine the length of an
object

Explain why the aperture of the spherical mirror should be small compared to the radius of curvature of the mirror.

We have a colorless transparent liquid. it looks like water. we seperated it into a solid and a liquid by evaporration and condention was this a chemichal or a physical seperation a. chemical seperation b. physical seperation

The sound level near a noisy air conditioner is 70 db. if two such units operate side by side, the sound level near the, would bea. 70dbb. 73 dbc. 105 dbd 140 db