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2 years ago

12

5. Which material has the highest thermal conductivity? Which material has the highest electrical conductivity? Explain why ther

mal and electrical conductivity is so high with this material.

1 answer:

Afina-wow [57]2 years ago

6 0

Answer:

Sliver

Explanation:

Silver has the highest electrical conductivity of all metals. :)

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A sample of Hydrogen gas has a volume of 25.5 liters at a pressure of 15.0 kPa. If the temperature is kept constant and the pres

patriot [66]

Answer:

<h2>7.65 litres </h2>

Explanation:

The new volume can be found by using the formula for Boyle's law which is

$P_1V_1 = P_2V_2$

Since we're finding the new volume

$V_2 = \frac{P_1V_1}{P_2} \\$

15 kPa = 15,000 Pa

50 kPa = 50,000 Pa

We have

$V_2 = \frac{15000 \times 25.5}{50000} = \frac{382500}{50000} \\ = 7.65$

We have the final answer as

<h3>7.65 litres </h3>

Hope this helps you

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3 years ago

jeka94

Construction of dam : scarcity of water for animals

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3 years ago

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Your friend, a business major, overhears you talking about chemical energy and food and decides to develop a new super food for

RUDIKE [14]

Answer:

The question is incomplete. The response options are as follows:

I. C-O or C=O

II. C-C

III. C-H

IV. O-H

The answer is: IV>III>I>II

Explanation:

V) O-H is a hydrogen bridge. The hydrogen bridge is characterized by being similar to dipole-dipole bonds.

III) C-H is an ionic bond. The ionic bond occurs when they fuse together due to electron transfer.

I) C=O is a covalent bond. The covalent bond happens when two atoms bond together to create a molecule, sharing its electrons that are in its most superficial layer,

II) C-C is covalent bond.

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3 years ago

24 CO2 (g) + 26 H2O (i ) + 15,026 kJ - 2 C12H26 (i ) + 37 O2 (g) ?<br><br> Endothermic or exothermic

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3 years ago

SOMEONE PLEASE HELP

Zinaida [17]

Answer:

6. 7870 kg/m³ (3 s.f.)

7. 33.4 g (3 s.f.)

8. 12600 kg/m³ (3 s.f.)

Explanation:

6. The SI unit for density is kg/m³. Thus convert the mass to Kg and volume to m³ first.

1 kg= 1000g

1m³= 1 ×10⁶ cm³

Mass of iron bar

= 64.2g

= 64.2 ÷1000 kg

= 0.0642 kg

Volume of iron bar

= 8.16 cm³

= 8.16 ÷ 10⁶

$= 8.16 \times 10^{ - 6} \: kg$

$\boxed{density = \frac{mass}{volume} }$

Density of iron bar

$= \frac{0.0642}{8.16 \times 10^{ - 6} }$

= 7870 kg/m³ (3 s.f.)

7.

$\boxed{mass = density \: \times volume}$

Mass

= 1.16 ×28.8

= 33.408 g

= 33.4 g (3 s.f.)

8. Volume of brick

= 12 cm³

$= 12 \times 10^{ - 6} \: m^{3} \\ = 1.2 \times 10^{ - 5} \: m ^{3}$

Mass of brick

= 151 g

= 151 ÷ 1000 kg

= 0.151 kg

Density of brick

= mass ÷ volume

$= \frac{0.151} {1.25 \times 10^{ - 5} } \\ = 12600 \: kg/ {m}^{3}$

(3 s.f.)

6 0

3 years ago