A needle valve and collar.
Answer:
im in hardvard dont cheat get amzing grades if you want to go here
Explanation:
Explanation:
Power of electric kettle, P = 1 kW
Voltage, V = 220 V
(a) Electric power is given by the formula as follows :

R is resistance

(b) When connected to a 220 V supply, it takes 3 minutes for the water in the kettle to reach boiling point.
Energy supplied is given by :

P is power, 

The answer is B. magnesium I am pretty sure