Question

define ecosystem..!!!!​

Answer 1

Explanation:

An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals, and other organisms

Answer 2

Explanation:

Solution

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Mass of the girl, m=50kg

Diameter of the heel, d=1cm=0.01m

Radius of the heel, r=

2

d

=0.005m

Area of the heel =πr

2

=π×(0.005)

2

=7.85×10

−5

m

2

Force exerted by the heel on the floor:

F=mg

=50×9.8

=490N

Pressure exerted by the heel on the floor:

P=

Area

Force

=490/(7.85×10

−5

)=6.24×10

6

N/m

2

Therefore, the pressure exerted by the heel on the horizontal floor is 6.24×10

6

N/m

2

.