A television has a power cord but a remote controller does not have a cord ,why?

In order to make the TV function, you need electricity to turn it on. The controller does not do anything with its electricity. The controller only turns on and off the TV and changes its channel. Think of it like a remote controlled or radio controlled car. You cannot use the RC car if there are no batteries in the RC car (also the remote but it already has batteries like a TV's remote controller), just like TV needs electricity in order to turn it on.

Explanation:

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

c8h10 is your answerr