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Damm [24]
2 years ago
12

Is blowing a dandelion a physical or chemical change? A. Physical B. Chemical

Chemistry
1 answer:
Pavel [41]2 years ago
7 0

Answer:

it is physicalchange

Explanation:

because the blowing dandelion can't be reversed back

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12. Which gas has the greatest kinetic energy at STP?
balandron [24]

Answer:

d. none of the above (all have the same kinetic energy)

Explanation:

The kinetic theory of gases states that the molecules of an ideal gas experience a constant random motion.

At standard temperature and pressure (STP), the kinetic energy of an ideal gas such as hydrogen, argon, neon, sodium, oxygen, helium, magnesium, beryllium, nitrogen, carbon, fluorine, chlorine etc are all the same.

The standard temperature and pressure (STP) of an ideal gas is 273K and 100 kPa.

Hence, all of the gases have the same kinetic energy at standard temperature and pressure (STP).

Kinetic energy can be defined as an energy possessed by an object or body due to its motion.

Mathematically, kinetic energy is given by the formula;

K.E = \frac{1}{2}MV^{2}

Where, K.E represents kinetic energy measured in Joules.

M represents mass measured in kilograms.

V represents velocity measured in metres per seconds square.

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3 years ago
1. carbon cycle
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Explanation:

1. carbon cycle

all of the physical processes and chemical reactions that result in the movement of carbon between the biosphere (living forms) and the geosphere (water, earth, and atmosphere)

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2. carbon footprint

a calculation that considers an individual's contribution to the process of global warming based on activities leading to greenhouse gas production

Carbon footprint is important in mapping the quota of carbon emitted into the atmosphere

It is the amount of greenhouse gases contributed into the atmosphere by individuals.

3. global warming

an overall increase in world temperatures that may be caused by additional heat being trapped by greenhouse gases

   It is the overall increase in global temperature. It has severe consequences.

  Global warming results when greenhouse gases in the atmosphere traps outgoing radiation in an anomalous way.

4. greenhouse gas

components of the air mixture that trap infrared (heat) energy

 Greenhouse gases are gases that prevents long wave radiation from leaving the earth surface. They absorb the gases in turn, warming occurs on earth.

Learn more:

Greenhouse gases brainly.com/question/4580761

#learnwithBrainly

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3 years ago
What reactions is : energy released as light or thermal energy ( synthesis, combustion, replacement, decomposition)
Levart [38]
This answer is synthesis
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ElenaW [278]
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2 years ago
400 ms^2/0.080 s <br><br> solve
Nana76 [90]

Answer: 5000ms^2 s

Explanation:

5 0
2 years ago
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