Answer:
It is not considered as a vacuum because the space around is not empty the space around it is filled with air like example the space has no air.
Answer:
C. it's relative distance to earth is closer than the other stars
The water is more dense than the needle so it can withstand the weight. It is the contraction of the water falling faster than the others forming a drop pattern or the water getting smaller so the top looked smaller.
A small sample of methane burns, releasing 120.0 kJ of heat and doing 830.0 kJ of work. The total energy released is -950.0 kJ.
Energy is a property that is transferred to a physical system, recognizable in the performance of work and in the form of heat and light.
A small sample of methane undergoes combustion. As the hot gas mixture expands, it releases energy (E).
- It releases 120.0 kJ of heat. By convention, when heat is released, we assign it a negative sign. Thus, q = -120.0 kJ.
- It does 830.0 kJ of work. By convention, when the system does work on the surroundings, we assign it a negative sign. Thus, w = -830.0 kJ.
The change in the energy is the sum of the heat released and the work done.
ΔE = q + w = -120.0 kJ + (-830.0 kJ) = -950.0 kJ
A small sample of methane burns, releasing 120.0 kJ of heat and doing 830.0 kJ of work. The total energy released is -950.0 kJ.
Learn more about energy here: brainly.com/question/13881533
Answer: 1.65
Explanation:
For a 0.0224M HCl solution the concentration of the hydrogen ions,
[H+] = is 0.0224 mol/L (i.e. 0.0224 M)
pH = −log[H+]
Substituting H+ = 0.0224 into the equation
pH = - log[0.0224]
pH = 1.649
pH = 1.65
