How do air sacs of birds help make body lighter

Answers

Answer 1

Answer: They lower the average density of their body; because of the air it feels like a slight decrease in the weight.

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Does a cell ever reach equilibrium

Answers

it nevers reaches equilibrium

Cells never reach equilibrium.

What is a physical form in which a substance can exist?

Answers

The three physical forms are:

Solid, liquid, or gas.

My homework says-Explain why weight would be different on different planets by talking about gravity.

Answers

And I gather that instead of trying it on your own, you want me to do it for you.

The force of gravity between two objects always involves the product of
both of their masses.

"Weight" is the force of gravity between a planet and an object on its surface,
so it depends on both masses.

When a rock, a space probe, or an astronaut goes to a different planet, its/his
mass doesn't change, but the mass of the body they're standing on is different.
So the weight of the rock or the astronaut is different from what it is on Earth.

Gravitational forces on different planets and natural satellites are different. Let's take an example of Moon and the Earth. The gravitational force on Moon is $(1)/(6) th$ of that on Earth. And we know that -

$Weight = mass*gravitational$ $acceleration$

So, this formula clearly depicts that Weight of any object depends on mass of that object as well as on the gravitational acceleration. So, the lesser gravitational acceleration on Moon makes an object weigh lighter on Moon than on Earth. Similarly it is true for different planets also.

How does a merry go round use potential and kinetic energy

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Answer: This should be a huge help in ur answer...

Explanation: potential energy is the energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors and kinetic energy is energy which a body possesses by virtue of being in motion.

how your weight would change with time if you were on a space ship traveling away from,earth toward the moon

Answers

u wouldn't get enough vitamins

A rock collection comes from which part of Earth?

Answers

Answer:

Crust

Explanation:

Rock is a solid mass, a collection of minerals which occur naturally. There are three different types of rocks- Igneous, Sedimentary and Metamorphic. These vary in texture and composition. The rocks come from the upper most layer of the Earth- the crust. Heat, pressure, volcanoes, wind and water play important role in formation of rocks.

Answer:

rocks form from the outer solid layer of the earth which is the crust

Explanation:

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If the mass of an object is 100kg and the acceleration due to gravity is 9.8m/s^2 what is the weight of the object

3. How many valence electrons are in the outermost energy level of each of the following elements? a. Helium b. Lithium c. Nitrogen d. Magnesium