No system is completely closed off from its surroundings. Which example represents a system that is almost completely closed?
O a wood-burning fireplace
an uncapped soda bottle
a capped thermos
a pot of boiling water
2.
3

muscle endurance

explanation:

i can do 50 in a row ( but i get so tired after that)

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2