<span>she is in contact with the trampoline for less than one second.</span>
All of these things were seen in formal experiments by the 19th century. But some of them are easy to see in your own home. It's obvious that light can reflect - you just have to look in a mirror. Light bounces off the mirror and goes into your eye so you can see yourself. It's also obvious that light can refract: All you have to do is put a spoon in a large glass of water and watch how the spoon appears to bend.
That happens because the light is bending as it moves between air and water. Both of these things can be seen even more clearly in a laboratory using beams of light or lasers.
B. it was necessary to see data from more plants before the conclusion could be accepted.
A) An electrical resistor
Hope that helps, Good luck! (:
Dependent on what you are measuring and what took you are using. Please be more specific.
