1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
adelina 88 [10]
2 years ago
5

I NEED HELP PLEASE !!!!!

Chemistry
2 answers:
Andrei [34K]2 years ago
4 0
Second choice : technology has replaced humans needs
Jobisdone [24]2 years ago
3 0

Answer: My opinion is the second one because a lot of humans uses technology and technilogy replaces a lot of stuff.

Explanation:

You might be interested in
Two sound waves are emitted from identical sources at the same time. They each travel a distance of 10 m, but one wave reaches t
kompoz [17]

Answer:

<em>Varying frequency</em> between both waves accounts for difference in speed.

Explanation:

The speed of a wave is dependent on four major factors:

  1. wavelength
  2. frequency
  3. medium, and
  4. temperature 

Assuming equal temperature and medium of travel of these sound waves, and given that the wavelength (that is distance of travel) is equal, the only varying factor would be their frequency.

Wave speed is calculated by multiplying the wavelength times the frequency

⇒ Speed = λ * <em>f</em>

4 0
3 years ago
Read 2 more answers
Why is sound able to travel faster through a solid than a gas?
noname [10]

Answer:

Sound travels more quickly through solids than through liquids and gases because the molecules of a solid are closer together and, therefore, can transmit the vibrations (energy) faster.

3 0
3 years ago
Read 2 more answers
Which occurs within a high pressure system?
blsea [12.9K]

Answer:

A high pressure system has higher pressure at its center than the areas around it. Winds blow away from high pressure. Swirling in the opposite direction from a low pressure system, the winds of a high pressure system rotate clockwise north of the equator and counterclockwise south of the equator.

3 0
3 years ago
Read 2 more answers
A penny has a total mass of 3.1 grams. Zinc makes up 2.9 g of the penny. What is the percentage of zinc in the penny?​
Savatey [412]
Find the proportion, and multiply it by 100 to get the percentage.
The proportion is 2.9/3.1=0.935
The percentage is 0.935*100=93.5
8 0
3 years ago
Read 2 more answers
A change involving whole atoms is called _____.
givi [52]

Answer is: chemical.

If the arrangement of particles is changed, that is chemical change or chemical reaction (new substance is formed).

In physical change, the bonds between oxygen and hydrogen can not be separated.

For example, balanced chemical reaction: 2Mg(s) + O₂(g) → 2MgO(s).

Chemical changes (chemical synthesis) is when a substance combines with another (in this example magnesium and oxygen) to form a new substance.

5 0
2 years ago
Other questions:
  • Select the reason why two molecules of benzaldehyde cannot react via the aldol condensation.
    15·1 answer
  • What is the pH of a 0.28 M solution of ascorbic acid
    11·1 answer
  • Akira records the speed of a reaction, first without a catalyst, and then with a catalyst
    10·2 answers
  • Which of the following best describes biogeochemical cycles? A. They cycle elements through the biotic and abiotic components of
    8·1 answer
  • Which of the following is the best example of chemical weathering?
    5·1 answer
  • What is a metabolic pathway? What is a metabolic pathway?
    5·2 answers
  • 2. HBIO3 name this acid.​
    11·1 answer
  • Which of four fossils would be the most useful as a reference to determine the age of newly discovered fossils?why?
    14·1 answer
  • When Brian first sorted out his thoughts, he figured this was the first day after the crash and what did he think would happen n
    6·1 answer
  • Which impact is the greatest negative of a new hydroelectric dam?.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!