Brianna weighs 425 n. she climbs a flight of stairs to a height of 8 m. it takes her 6 seconds.

how much work does brianna do when she climbs the stairs?

a.
3400 j

b.
53 j

c.
2550 j

d.
71 j
a

Why is it important to study each branch of earth science?

Which of the following human activities resulted in the growth of the north american deer population?

Grasses--> mice--> cats--> coyotes suppose 10,000 units of energy are available at the level of the grasses. what is the total number of energy units lost by the time energy reaches the coyote?