B. How many people were included in the study.
Answer:Dropping is not a good predictor of when labor will begin. In first-time mothers, dropping usually occurs 2 to 4 weeks before delivery, but it can happen earlier. In women who have already had children, the baby may not drop until labor begins.
Explanation:
The formula F=velocity/wavelength
F=24/2
F=12 Hz
Amagat's law of additive volumes states that we can simply add up the individual volumes of each gas (provided they are at the same temperature and pressure) to get the total volume of the mixture. Conservation of volume is an acceptable assumption for gases (but not always for liquid mixtures). This works for gases since the molecules are very small and only take up a minimal amount of space in a gas.
Answer:
Explanation:
The recombination rate is denoted by R it is the ratio of excess carrier concentration and life time
The recombination rate R is given by 
We have given excess carrier concentration = 
Life time 
So recombination rate 
