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3 years ago

Which of the following adaptations best protects birds from bird catchers?

Physics

2 answers:

andrew-mc [135]3 years ago

5 0

Wings to fly. Without flying, birds would be near defenseless.

Elanso [62]3 years ago

4 0

Well all of these answer choice technically could be correct, (Depending on the circumstances) but the most logical answer is wings to fly. without wings to fly how would they escape a dangerous situation? but lets just say what if the bird couldn't fly? the most logical answer would be dark colors because the bird has the ability to conceal itself from predators because of the dark colors. like I said before, all of these answer choice would technically be correct but the correct answer is D) WINGS TO FLY!!!!!!

Hope I was able to help,~kashout kam

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A person carries a plank of wood 1.6 m long with one hand pushing down on it at one end with a force F1 and the other hand holdi

Elis [28]

Answer: $115.52\ N$

Explanation:

Given

Length of plank is 1.6 m

Force $F_1$ is applied on the left side of plank

Force $F_2$ is applied 43 cm from the left end O.

Mass of the plank is $m=13.7\ kg$

for equilibrium

Net torque must be zero. Taking torque about left side of the plank

$\Rightarrow mg\times 0.8-F_2\times 0.43=0\\\\\Rightarrow F_2=\dfrac{13.7\times 9.8\times 0.8}{0.43}\\\\\Rightarrow F_2=249.78\ N$

Net vertical force must be zero on the plank

$\Rightarrow F_1+W-F_2=0\\\Rightarrow F_1=F_2-W\\\Rightarrow F_1=249.78-13.7\times 9.8\\\Rightarrow F_1=115.52\ N$

8 0

2 years ago

What are the two ways that scientists can study earth's history

Alika [10]

If you mean climate change. Then scientists can study it by seeing where places and things are eroded.

8 0

2 years ago

A person carries a mass of 10 kg and walks along the +x-axis for a distance of 100m with a constant velocity of 2 m/s. What is t

gizmo_the_mogwai [7]

Since the direction of the force and the direction of the path is perpendicular, the person is not doing any physical work.

3 0

2 years ago

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vekshin1

Answer:

Cu2+

Explanation:

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Which component of magma includes mobile ions of silicon?

Lemur [1.5K]

Answer:

Melt.

Explanation:

When rocks melt, they do so slowly and gradually because most rocks are made of several minerals, which all have different melting points; moreover, the physical and chemical relationships controlling the melting are complex. As a rock melts, for example, its volume changes. When enough rock is melted, the small globules of melt link up and soften the rock.

Under normal conditions, mantle rock like peridotite shouldn't melt in the Earth's upper mantle. However, by adding water you can lower the melting point of the rock. Alternatively, by decompressing the rock, you can bring it to a pressure where the melting point is lower. In both cases, basalt magma will form and considering it is hotter and less dense than the surrounding rock, it will percolate towards the surface and some of that erupts.

6 0

2 years ago