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3 years ago

. There are fewer organisms at the highest trophic levels, because

Physics

1 answer:

Amiraneli [1.4K]3 years ago

7 0

Answer:

Because there is less energy at higher trophic levels

Explanation:

In a food chain that shows the feeding levels of organisms in an ecosystem, energy decreases as you move from the lowest trophic level to the highest trophic level.
The lowest trophic level consists of producers which have the highest energy as they trap energy directly from the sunlight.
The energy is lost from one trophic level to the next up to the highest trophic level which has the lowest energy.
Therefore, organisms at the highest trophic level are fewer in number but large in size.

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The triceps muscle in the back of the upper arm extends the forearm. This muscle in a professional boxer exerts a force of 2615

mart [117]

Answer:

0.68 kg-m²

Explanation:

F = Force applied by the muscle = 2615 N

r = effective perpendicular lever arm = 2.85 cm = 0.0285 m

α = Angular acceleration of the forearm = 110.0 rad/s²

I = moment of inertia of the boxer's forearm = ?

Torque is given as

τ = I α eq-1

Torque is also given as

τ = r F eq-2

using eq-1 and eq-2

r F = I α

(0.0285)(2615) = (110.0) I

I = 0.68 kg-m²

7 0

3 years ago

a dad expends 200 joules of work pushing a stroller up a hill. he produces 125 j of work. how efficient is he being?

AVprozaik [17]

Not efficient enough

7 0

2 years ago

On a night when the moon rises at 9 pm, what is its phase?

Leni [432]

Waning Gibbous would be the phase?

5 0

3 years ago

You can use _______________ to change a liquid into a gas.

Nitella [24]

Answer:

below

Explanation: When a liquid changes into a gas vaporization has occurred. The process can either occur due to boiling or evaporation. Boiling occurs when the vapor pressure of the liquid is raised (by heating) to the point where it is equal to the atmospheric pressure.

7 0

2 years ago

You push very hard on a heavy desk, trying to move it. You do work on the desk:

frozen [14]

Answer:

Explanation:

We know that work done is given by

$W=F.d=Fdcos\Theta$

So there are two case in which work done is zero

First case is that when force and displacement are perpendicular to each other

And other case is that when there is no displacement

So for work to be done there must have displacement, if there is no displacement then there is no work done

So option (c) will be the correct option

3 0

3 years ago