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.
Since there are no choices given, I will explain the cycle of a star. The beginning development of a
star is marked by a supernova explosion, with the gases present in the nebula
being forced to scatter. As the star shrinks, radiation of the surface
increases and create pressure on the outside shell to push it away and forming
a planetary nebula or white dwarf. <span>The star is a ball of hot gases containing different kinds of
elements at different cores. It has a very high temperature that radiates all
throughout the Milky Way galaxy. The star has four main parts; the core,
photosphere, chromospheres and corona. The outer core of a star located at the
chromospheres contains mostly of hydrogen. Inside the hydrogen is helium then
carbon, oxygen, neon, magnesium silicon and the inert gas. When a star releases
energy it is due to the thermonuclear fusion of hydrogen into helium. </span>
Answer:
4992 J
Explanation:
Force, F = 39 N
Distance, s = 128 m
Work done = force x distance
W = 39 x 128
W = 4992 J
Thus, the work done is 4992 J.
I think the correct answer would be <span> sugars digested by saliva. This describes a chemical change since new substances are produced since reaction happens due to the enzymes in the saliva. Hope this answers the question. Have a nice day.</span>
Answer:
200 newtons
Explanation:
because the sub air that would pull the force down by all of the mass of the sub air go down by that 400 newtons there for your anwer is 200 newtons. because 600-400=200
