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
Vlad1618 [11]
3 years ago
13

Please answer this question to help me out.... 8TH GRADE SCIENCE.

Chemistry
1 answer:
son4ous [18]3 years ago
5 0

Answer:

3

Explanation:

The line has less bumps and goes slower then line two

You might be interested in
Why is it important to study chemical reactions in closed containers
tino4ka555 [31]
Because they could have an explosive reaction and could possibly hurt you

7 0
3 years ago
Read 2 more answers
At room temperature, the surface tension of water is 72.0 mJ·m–2. What is the energy required to change a spherical drop of wate
Keith_Richards [23]
It is given that the surface area of sphere is 4 π r² and its volume is (4/3 π r³)
With a diameter of 1.2 mm you have a radius of 0.6 mm so the surface area about 4.5 mm² and the volume is about 0.9 mm³ 
The total surface energy of the original droplet is (4.5 x 10⁻⁶ m x 72) = 3.24 x 10⁻⁴mJ
The five smaller droplets need to have the same volume as the original so:
5 V = 0.9 mm³ so the volume of smaller sphere will equal 0.18 mm³
Since this smaller volume still have volume (4/3 π r³) so r = 0.35 mm
Each of the smaller droplets has a surface are = 1.54 mm² 
The surface energy of the 5 smaller droplet is then (5 x 1.54 x 10⁻⁶ m x 72) = 5.54 x 10⁻⁴ mJ
From this radius the surface energy of all smaller droplets is 5.54 x 10⁻⁴ and the difference in energy is (5.54 x 10⁻⁴) - (3.24 x 10⁻⁴) = 2.3 x 10⁻⁴ mJ
Therefore we need about 2.3 x 10⁻⁴ mJ of energy to change a spherical droplet of water of diameter 1.2 mm into 5 identical smaller droplets
5 0
3 years ago
Identify the combustion reaction
Paladinen [302]

Answer:

The combustion reaction is the last one, with the C4H12 compound.

Remember that all the combustion reactions has the oxygen as a substract and for products, you'll have CO2 and water.

Explanation:

3 0
4 years ago
Why does a physical change occur when iodine is heated?
makkiz [27]

Answer:

Explanation:

when few crystals of iodine are added to test tube

the test tube gets heated and turns into a gas

which later soldifies to a liquid

I hope this helps

8 0
3 years ago
What is the effect of constant stirring on the solubility of solids and liquids?
vfiekz [6]

Stirring affects how quickly a solute dissolves in a solvent, but has no effect on how much solute will dissolve. The amount of solute that will dissolve is affected by temperature - more will dissolve at higher temperatures. This is called the solubility of the solute

3 0
3 years ago
Other questions:
  • How does the volume occupied by a cubic centimeter compare with the volume occupied by a millimeter
    14·1 answer
  • Olivia became interested in the fossil evidence that Wegener used to form his hypothesis of continental drift. How did fossils s
    14·1 answer
  • 1. In a hypothetical city, the temperature is dropping and the skies are clearing. How would the barometer be changing?
    6·1 answer
  • PLEASE HELP ASAP
    13·1 answer
  • The label on a box of granola indicates that it contains 13 grams of added sugars, and 240 Calories per serving. What percent of
    15·1 answer
  • Is elemental phosphorus dull or high luster?
    5·1 answer
  • Please answer this and explain why :)
    9·1 answer
  • A reaction in which an acid reacts with an alkali to produce a salt and water only is known as
    7·2 answers
  • What are air pollutants
    8·1 answer
  • An example of polytamic anoin would be a. Ca+2 b. NH4+ c. F d. PO4-3
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!