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MaRussiya [10]
3 years ago
6

11 Which is a bright streak of light in Earth's atmosphere?

Chemistry
2 answers:
wolverine [178]3 years ago
7 0
A Comet a comet leaves a bright streak following its trail
LuckyWell [14K]3 years ago
4 0

Answer:

B. a meteor

Explanation:

Meteors, also known as shooting stars, are pieces of dust and debris from space that burn up in Earth's atmosphere, where they can create bright streaks across the night sky.

Hope this helped!!!

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A hot pot of water is set on the counter to cool. After a few minutes it has lost 495 J of heat energy. How much heat energy has
Brums [2.3K]

Answer:

495 J

Explanation:

When the hot pot was set on the counter to cool, heat energy was lost from the pot. Note that according to the first law of thermodynamics, heat is neither created nor destroyed.

This implies that, the heat energy lost from the pot must be gained by the surrounding air. Therefore, if 495 J of energy is lost from the pot, then 495 J of energy is gained by the surrounding air.

4 0
3 years ago
A question on Reactants.
Natasha2012 [34]

Answer:

b lithium and water

Explanation:

8 0
3 years ago
14.
Igoryamba
Hello there.

Question: <span>Compare the following words. Which word best describes a scientific model?
replica
analogy
theory
technology

Answer: It would be replica.

Hope This Helps You!
Good Luck Studying ^-^</span>
4 0
3 years ago
Read 2 more answers
Can someone easily explain to me how to do reaction rates?
iVinArrow [24]

Explanation:

Reaction rate is a measure of speed of a chemical reaction.

Usually, based on rates, reactions can be divided into two parts:

  • Slow reactions which usually takes a long time.
  • Fast reactions which takes place completely in seconds or microseconds.

Reaction rate can be defined as a change in the concentration of a reactant or product per unit time:

      The unit is  mol dm⁻³ s⁻¹

Reaction rate = \frac{change in concentration of a reactant and product}{time taken }

The measurement of the reaction rate is based on the disappearance of a reactant or appearance of a product with increasing reaction time.

Learn more:

Reaction rate brainly.com/question/9642960

#learnwithBrainly

5 0
4 years ago
Which orbital has the highest energy level
fgiga [73]

Answer:

p orbitals

Explanation:

3 0
3 years ago
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