Answer:
Explanation:
According to the statement of the problems, the following identity exists:
After some algebraic handling, the ratio is obtained:
(YOU WILL GET BRAINLIEST)Matter may be classified as a pure substance or a mixture. Where on the Venn diagram would you insert t
he term "pure substance"?
A) A
B) B
C) C
D) D
A) A
B) B
C) C
D) D
2 answers:
Answer: Option (B) is the correct answer.
Explanation:
Anything that has space and occupies volume is known as matter.
A pure substance can be molecule of an element or molecule of a compound.
A molecule can have atoms of either same or different element. Whereas a compound has atoms of different elements.
For example, is a molecule with similar atoms, that is, hydrogen element.
is a compound that contains hydrogen and oxygen atom.
Thus, we can conclude that pure substance contains molecule of an element or molecule of a compound.
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Answer:
speed of boat as
river speed is given as
Explanation:
When boat is moving down stream then in that case net resultant speed of the boat is given as
since the boat and river is in same direction so we will have
Now when boat moves upstream then in that case the net speed of the boat is opposite to the speed of the river
so here we have
as we know when boat is in downstream then in that case it covers 24 miles in 2 hours
also when it moves in upstream then it covers same distance in 3 hours of time
so we have speed of boat as
river speed is given as
Answer:
The value of total energy needed per minute for the humidifier = 77.78 KJ
Explanation:
Total energy per minute the humidifier required = Energy required to heat water to boiling point) + Energy required to convert liquid water into vapor at the boiling point) ----- (1)
Specific heat of water = 4190
The heat of vaporization is = 2256
Mass = 0.030 kg
Energy needed to heat water to boiling point =
Energy needed to heat water to boiling point = 0.030 × 4.19 × (100 - 20)
Energy () = 10.08 KJ
Energy needed to convert liquid water into vapor at the boiling point
= 0.030 × 2256 = 67.68 KJ
Thus the total energy needed E = +
E = 10.08 + 67.68
E = 77.78 KJ
This is the value of total energy needed per minute for the humidifier.