Question

Which best explains why a wood-burning fireplace does not represent a closed system?

A.
because they can be used for cooking

B.
because the ashes have to be swept away

C.
because they are not all made of brick

D.
because a fire requires oxygen from the atmosphere to burn

I think D

Answer 1

@vannah*

Answer 2

@Nurali

Answer 3

The system is not closed if matter can enter or escape.

Answer 4

so i'm wrong?

Answer 5

@Phebe @Godlovesme

Answer 6

plz help

Answer 7

@k_lynn

Answer 8

am i right?

Answer 9

Well a fire can't burn if it doesn't have oxygen. I think a closed system is something where no matter can escape. If it's an opened fire place, matter, like ashes and soot and stuff can escape.

Answer 10

I'm not really that good at physics so I'm not exactly sure.

Answer 11

ok

Answer 12

But I think you're right though.

Answer 13

Thanks ^_^

Answer 14

yep, no problem. Glad to help. :)

Answer 15

sry i was busy
wasnt here at the time