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defon
2 years ago
9

When you break an iron magnet into two pieces, you get ____.

Chemistry
2 answers:
Rudiy272 years ago
5 0

Answer:

two north poles and two south poles

Explanation:

A single magnet has a north pole and a south pole. If it is broken into two pieces, then each of the two pieces will have a north pole and a south pole.

No matter how many times or into how many pieces a magnet is broken, the resulting pieces will have two poles each.

Hatshy [7]2 years ago
3 0

Answer:

Each piece will still have a north pole and a south pole.

Explanation:

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A student calculates the density of an unknown metal sample to be 8.25 g/cm3
romanna [79]

Answer:

the answer is b

Explanation:

mass=198 divided by volume 24 gives you 8.25

4 0
3 years ago
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8 0
2 years ago
A helium-filled balloon escapes a child's hand at sea level and 21.1 deg C. When it reaches an altitude of 3000 m, where the tem
olga2289 [7]

Answer:

Explanation:

Well use the combines gas law to evaluate this question;

P₁V₁/T₁ = P₂V₂/T₂     (Remember that at sea level the pressure is usually 1 atm)

1 * V₁ / 294.25 = 0.72 * V₂ / 277.95     (NB: Temperatures have to be in Kelvin)

V₁ / 294.25 * 277.95     = 0.72 V₂

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0.945/0.72 V₁ = V₂

1.312 V₁ = V₂

The volume (V2) at 3000 m altitude will be <u>1.312 </u>bigger than the initial volume at sea level.

3 0
2 years ago
Which statements about allosteric enzymes are true?
Ainat [17]

Answer:

1,2 and 4 are correct

Explanation:

Enzymes that show cooperativity are defined as Allosteric enzymes. This cooperativity is of several types.

1) homotropic/homoallestery - positive cooperation

2) heterotropic/heteroallestery - negative cooperation

Activity of allosteric enzymes is regulated by other molecules (effector molecules)

Hence, statement 1 and 2 are correct.

Binding curve of allosteric enzymes:

For cooperative binding, binding curve is Sigmoidal curve

For non cooperative binding, binding curve is Hyperboilc curve.

Hence, statement 3 is wrong.

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Allosteric enzymes are often multi sub unit proteins.

Hence, statement 4 is correct.

4 0
3 years ago
3. How many moles of HCl are present in 3.70 L of a 2.33 M HCl solution?
Lubov Fominskaja [6]

Answer:

8.6 mol

Explanation:

number of moles = molar concentration x volume in litre

number of moles = 2.33 M x 3.70 L = 8.6 mol

4 0
3 years ago
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