A "step-down" transformer is used to reduce the voltage from 11060 V to 240 V before it is connected to houses in a neighborhood. If the transformer has 50 turns on the secondary, how many turns does it have on the primary

N₁ = 2304 turns

Explanation:

The ratio of a transformer is

          ΔV₁ / N₁ = ΔV₂ / N₂

Let's use index 1 for primary and index 2 for secondary

          N₁ = ΔV₁ / ΔV₂ N₂

Let's calculate

        N1 = 11060/240 50

        N1 = 2304 turns

b) phosphorus pentoxide

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.