Joules
Joule is a unit of energy.
There are very limited science words that start with J and none of them are related to light and sound. However, aÊjoule is a unit of electrical, mechanical, or heat energy.
an apparatus.
See Microscope.
because of waqass
most science apparatus is made of pyrex glass which is specially treated to resist heat stress.
Apparatus
yes
Japan is an island that starts with J.
No there is no Mario character that starts with a J
science starts here, starts now.
A street that starts with a J is "Jackson street" and "J street".