Metals are used for making school bells because they are sonorous and produce loud sounds when struck. Electric wires are coated with insulating materials like PVC and rubber to prevent electric shocks, as the metal wires inside conduct electricity. Common metals used for cooking vessels include aluminum, copper, and iron, which have good thermal conductivity and allow heat to be transmitted quickly to cook food faster.
7. why school bells are made of
metals?
Bells made up of metals and not
from wood because metals have the
capability to produce sound when
hit with a solid object, i.e, they are
Sonorous. Therefore, students will
be able;e to hear the sound loud
when bell hits.
8. The wires that carry current in your homes have a coating of
polyvinylchloride (pvc) or a rubber-like material. why are electric
wires coated with such substances?
PVC is an insulator, so wires
are coated with it to keep us
from getting electric shocks.
Electric wires are made of
metals that conduct
electricity, such as copper,
but they are coated with
rubber.
9. Can you name some metals that are used for making
cooking vessels? Do you know why these metals are
used for making vessels?
Aluminium, Copper,
Iron are the commonly
used metals used for
cooking.
1. Their thermal
conduction property is
very good. They
transmit heat easily
ensuring that the food
gets cooked faster.
