PHYSICS MIDDLE SCHOOL

The muscular system and the skeletal system of the human body work together toA. allow movement.
B. perform respiration.
C. transport nutrients.
D. protect the integumentary system.

Answers

Answer 1
Answer:  A. Allow movement.  
Muscles connect to your skeleton and they contract and move the skeleton along. They help the process of movement happen in a smoother manner.
Answer 2
Answer: A. Because they connect together for movement of the body.

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How does compression (the force) work? Not tension and compression. Just compression.

Answers

What allows an arch bridge to span greater distances than a beam bridge, or a suspension bridge to stretch over a distance seven times that of an arch bridge? The answer lies in how each bridge type deals with the important forces of compression and tension.

Which statement best describes the properties of sodium chloride?A.) Sodium chloride is a malleable solid.
B.) Solid sodium chloride is a good conductor of electric current.
C.) Sodium chloride has a low melting point.
D.) Liquid sodium chloride is a good conductor of electric current.

Answers

NaCl solutions are electrically conductive because they are a powerful electrolyte in which the constituent ions completely separate, resulting in free-moving ions in the solution.c Thus, option D is correct.

What best describes the properties of sodium chloride?

The ions (Na+& Cl) are free to move around and can thus function as charge carriers, since the motility of individual atoms or molecules in liquid state is significantly larger than that of solid state. Because of the free ions, molten sodium chloride is a good conductor of electricity.

The charged particles (ions) in solid “[NaCl]” cannot move because they are bound by powerful electrostatic forces, making it a poor conductor of electricity. They cannot conduct electricity as a result.

Therefore, NaCl solutions are electrically conductive because they are a powerful electrolyte in which the constituent ions completely separate, resulting in free-moving ions in the solution.

Learn more about sodium chloride here:

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D. because sodium chloride is an ion

first of all , sodium chloride is salt and  we all know that it is not malleable.

sodium chloride is an ion which do conduct electricity but not when they are solid.....they only do so when they are molten or aqueous ( dissolved in water )

sodium chloride is an ion. ions have high melting points.

D is true because as i have mentioned above , ions will conduct electricity when dissolved in water / aqueous or molten.......... HOPE IT HELPED !!!!!!

How long does it take for the speed of light and sound to travel around the world

Answers


-- Light travels straight, not around in a circle. But if it did, it would cover
a distance equal to the length of the equator in about 0.13 second.

-- At the speed of sound (in air at standard temperature and pressure),
it would take about 32.6 hours to cover the same distance.

If you can see the conductor in a lamp should you use it or not?

Answers

No because it's conducting heat and when it does that it means it's hot so you would burn yourself. 
Seeing does not matters . What matters is that can you be in direct contact woth the conductor or not (if there is a glass or plastic chamber or not).

When using the right-hand rule to determine the direction of the magnetic field around a current-carrying wire, which part of theright hand points in the direction of the magnetic field?

-palm
-fingers
-back
-thumb

Answers

Answer: Palm

Explanation: When you have a wire, you must point your thumb in the direction in which the electricity is going, and now you close your palm, in the direction in which you closed your hand is in the direction in which points the magnetic field.

Then the correct option is the first one, the palm points in the direction of the magnetic field.

Answer:

Fingers

Explanation:

The index finger shows the moving charge, while your middle finger shows the magnetic field line.

Give 3 examples to show work being done.

Answers

In the Physics definition of 'work' :


-- Pick up a book from off the table.


-- Push a crate along the floor.

-- Roll a ball up a ramp.


-- Drop a rock off a cliff into the water.
(Gravity does the work in this one.)
1. Read the question
 
 2. Try to solve the answer

3. Then write the answer down 
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