Answer:
it is a vector arrow
a vector show the speed and direction
The water has an irregular surface so if the light rays fall on top then it will reflect oppositely or in some cases may refract, so the fish will seem a bit smaller or further or closer in anyway, example if u put a straw in water it looks bent but is it ? nope. So the main reason is that it refracts which makes the accuracy lesser which make it difficult.
Pressing the button: Mechanical to electrical
<span>Waste energy from this step: Mechanical to heat </span>
<span>Converting electrical signal to IR: electrical to electromagnetic (infrared rays) </span>
<span>Waste energy from this step: electrical to heat </span>
<span>Chemical energy from battery: chemical to electrical</span>
Answer:
This experiment lets you repeat Galileo's experiment in a vacuum. The free fall of a coin and feather are compared, first in a tube full of air and then in a vacuum. With air resistance, the feathers fall more slowly. In a vacuum, the objects fall at the same rate independent of their respective masses.
