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Oxana [17]
3 years ago
8

The volume of a container is 40 cm 3 . It has a length of 4 cm, a width of 2 cm. What is the height of the container?

Physics
1 answer:
lakkis [162]3 years ago
4 0

Answer:

5cm

4x2 =8, 8x5 =40

so 4 x 2 x 5 = 40cm3

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The system below has a friction force of 25 N acting on the cart which 8 kg. The mass hanging off the edge has a mass of 6 kg. F
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The cart will be pulled to the right by the hanging mass, so by Newton's second law, the net force on the cart is

<em>T</em> - 25 N = (8 kg) <em>a</em>

where <em>T</em> is the tension in the rope and <em>a</em> is the acceleration.

The hanging mass has a net force of

(6 kg) <em>g</em> - <em>T</em> = (6 kg) <em>a</em>

where <em>g</em> = 9.8 m/s².

Adding these equations together eliminates <em>T</em>, and we can solve for <em>a</em> :

(<em>T</em> - 25 N) + ((6 kg) <em>g</em> - <em>T </em>) = (14 kg) <em>a</em>

33.8 N = (14 kg) <em>a</em>

<em>a</em> = (33.8 N) / (14 kg) ≈ 2.4 m/s²

Then the tension in the rope is

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<em>T</em> ≈ 25 N + 19.31 N ≈ 44 N

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3 years ago
During energy transformation, all energy systems: are
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B: Energy lose

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Which of these ionic compounds have polyatomic ions? Check all that apply.
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Answer:

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Explanation:

Polyatomic ions are ions that contain more than one atom in each one of the ions.  

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List the ions in each compound:

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\rm {CO_3}^{2-} is a polyatomic ion for it contains four atoms (one C atom and three O atoms) in each ion.

<h3>NaF</h3>

Cation: \rm Na^{+},

Anion: \rm F^{-}.

Both \rm Na^{+} and \rm F^{-} are monatomic for they contain only one atom in each ion.

<h3>FeO</h3>

Cation: \rm Fe^{2+},

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Both \rm Fe^{2+} and \rm O^{2-} are monatomic for they contain only one atom in each ion.

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Cation: \rm Ca^{2+},

Anion: \rm {Cl}^{-}.

Both \rm Ca^{2+} and \rm Cl^{-} are monatomic for they contain only one atom in each ion.

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Cation: \rm Na^{+},

Anion: \rm {OH}^{-}.

\rm Na^{+} is a monatomic ion for it contains only one atom in each ion.

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