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Kruka [31]
3 years ago
6

How can you demonstrate waves?​

Chemistry
1 answer:
Lady bird [3.3K]3 years ago
7 0
Shaking a phone cord, strumming a guitar string, playing a trumpet
You might be interested in
answer now please Which device can be used to separate nails from sawdust most efficiently? A. strainer B. magnet C. colander D.
e-lub [12.9K]
A magnet because it will remove only metal and not the saw dust

Hope this helps
6 0
3 years ago
Read 2 more answers
Plz i wanna those answers click on the photo to see all the question they are 2 queastions part A and B
dezoksy [38]

Answer:

a.

Turn paper Blue - these are alkaline/ base substances.

  • Toothpaste
  • Soap
  • Bleach

Turn paper Red - these substances are acidic in nature.

  • Lemon Juice
  • Vinegar
  • Cola drink

b. i. A wasp sting - Lemon juice

ii. A bee sting - Toothpaste

iii. A wasp sting is alkaline which means that running an acidic substance like lemon or lemon juice on it should neutralize it.

A bee sting is acidic so an alkaline substance such as toothpaste should neutralize it as well.

6 0
2 years ago
When the equation below is correctly balanced, the coefficient for CO2 is
vaieri [72.5K]

Answer:

The answer to your question is 4

Explanation:

Chemical reaction

                C₂H₆  +  O₂  ⇒  CO₂  +  H₂O

           Reactants    Elements    Products

                  2            Carbon              1

                  6            Hydrogen         2

                  2            Oxygen             3

Balanced chemical reaction

                2C₂H₆  +  7O₂  ⇒  4CO₂  +  6H₂O

           Reactants    Elements    Products

                  4            Carbon             4

                 12            Hydrogen       12

                 14            Oxygen           14

When the reaction is balanced the coefficient for CO₂ is 4.

5 0
3 years ago
Isotopes ____________ the atomic mass of an element because they have a ____________ number of neutrons.
blondinia [14]
B. Increase or decrease, different
8 0
3 years ago
Read 2 more answers
What did Dalton’s atomic theory teach
sweet-ann [11.9K]

Answer:

  • All matter is composed of atoms.
  • Atoms are not destructible.
  • Compounds formation occur by the combination of one or different types of atoms
  • In the chemical reactions, atoms are rearranged.
  • The atom of the same elements are similar in size and properties and the Atoms of the different elements are different in size and properties.

Explanation:

  • <u>John Dalton has developed the Dalton atomic theory.</u>
  • Dalton atomic theory was the first to explain that all matters composed of atoms and its properties, the atom as the smallest particle which cannot be destroyed and damaged.
  • This theory was based on the <u>law of conservation of mass and law of constant composition.</u>
  • His theory was accepted by many scientists.

6 0
3 years ago
Read 2 more answers
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