ü Menggunakan Rajah 4.1 kanta cekung dan 4.2 kanta cembung, bandingkan ketebalan dan panjang fokus kanta tersebut. Terangkan hubungan antara ketebalan dengan kuasa kanta. [4 markah]

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

Talia is manufacturing rolls of wire for hanging pictures. she needs a material that is so that it can easily be pulled into wire without breaking.

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9