Answer:
Option B
The molecules in thermometer spread apart
Explanation:
The mercury within the thermometer spread apart leading to an increase in temperature reading in the thermometer. The spreading apart of mercury molecules is caused by an increase in kinetic energy of molecules and with time the increase in kinetic energy decreases making the reading to stop increasing hence constant.
Rotation- sunset,sunrise,moons movement
all the others are revolution
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Answer:

So a=3.844 and b=5
Explanation:
Scientific notation requests to write a number using powers of ten as a factor accompanying a real number (a) between 1 and smaller than 10 that contains the digits to exactly represent the original number. So in this case, the number 384,400 can be written as:

with a=3.844, and "5" as the exponent of ten (so b=5)