A phase change is a physical change.
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Answer:
The inner diameter of the steam tube is 0.1185 m.
Explanation:
m = mass flow rate
= density of the liquid
V=specific volume =
v = velocity of the liquid
A = area of cross-section
Diameter of the cross-section = d = 2r
Given: m = 18 kg/s, v = 60 m/s,A=?, 
Area of the inner cross section = 
d = 0.1185 m
The inner diameter of the steam tube is 0.1185 m.
Answer:
In the desert, the climate is hot and dry, while in the tundra, it is cold and wet.
Explanation:
in the desert, plants need more water, while in the tundra, they have ice and snow
According to Hasselbalch equation pH = pKa at the equal point. When pH equals the pKa value of the indicator, the base and acid forms of indicator are present in the ratio of 1:1
(9.3 + 10.5) / 2 =9.9
pKa = 9.9
Using the equation pH = pKa at equal point we get
Ka = 10^- pKa
Ka = 10^- 9.9
Ka = 1.26 x 10^-10
Ka = 1 x 10^-10
Answer:
there are two significant figures
Explanation:
