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Sergio [31]
3 years ago
5

Explain how heat moves from one end of a metal rod to the other. (use terms small particles/ atoms, collide, transfer of energy,

high/low temperature region to elaborate) /2 ____________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Do you think the drawing pins may fall? Give a scientific reason to support your answer. /2
________________________________________________________________________________________________________________________________________________________

Chemistry
1 answer:
lisabon 2012 [21]3 years ago
3 0

Answer:

I only know number one answer hope it is helpful

Conduction is the transfer of heat through stationary matter by physical contact. (The matter is stationary on a macroscopic scale—we know there is thermal motion of the atoms and molecules at any temperature above absolute zero.) Heat transferred from an electric stove to the bottom of a pot is an example of conduction.

Some materials conduct thermal energy faster than others. For example, the pillow in your room may the same temperature as the metal doorknob, but the doorknob feels cooler to the touch. In general, good conductors of electricity (metals like copper, aluminum, gold, and silver) are also good heat conductors, whereas insulators of electricity (wood, plastic, and rubber) are poor heat conductors.

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yarga [219]
D. Ba and F. Took the test
7 0
3 years ago
Calculate the number of moles of a gas that is present in a 7.55 L container at 45°C, if the gas exerts a pressure of 725mm Hg.
vovikov84 [41]

<u>Answer:</u> The number of moles of gas present is 0.276 moles

<u>Explanation:</u>

To calculate the number of moles of gas, we use the equation given by ideal gas:

PV = nRT

where,

P = Pressure of the gas = 725 mm Hg

V = Volume of the gas = 7.55 L

n = number of moles of gas = ?

R = Gas constant = 62.3637\text{ L.mmHg }mol^{-1}K^{-1}

T = Temperature of the gas = 45^oC=(45+273)K=318K

Putting values in above equation, we get:

725mmHg\times 7.55L=n\times 62.3637\text{ L.mmHg }mol^{-1}K^{-1}\times 318K\\\\n=0.276mol

Hence, the number of moles of gas present is 0.276 moles

4 0
3 years ago
2 gallons is equal to how many liters
Arte-miy333 [17]

Answer:

7.57082

Explanation:

its just the answer

7 0
3 years ago
Is this showing a lunar or solar eclipse? Explain what is happening from the viewpoint of Earth.
GalinKa [24]

Answer:

Solar eclipse

Explanation:

A solar eclipse occurs when a portion of the Earth is engulfed in a shadow cast by the Moon which fully or partially blocks sunlight. This occurs when the Sun, Moon and Earth are aligned. Such alignment coincides with a new moon indicating the Moon

4 0
3 years ago
Read 2 more answers
What demonstrated Kinetic Energy
FrozenT [24]

Kinetic Energy Statement

Kinetic energy is energy that a body possess as a result of its motion. Kinetic energy as it is mathematically written is the "classic statement" of: Kinetic energy is equal to half the mass of an object times its velocity squared.

There are five types of kinetic energy: radiant, thermal, sound, electrical and mechanical. Let us look at some of the kinetic energy examples and learn more about the different types of kinetic energy.

Hope this helped!

❤️

4 0
3 years ago
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