How does what differ from mass?
Yes it is. It is a rate of speed.
Liquids differ in the rate at which they evaporate.
This is the ratio volume/time.
The rate of ion exchange is typically faster with a higher surface to volume ratio. This is because a higher surface area allows for more contact points for ions to interact with the exchange material, increasing the efficiency of the process. A higher surface to volume ratio provides more active sites for ion exchange to occur, leading to a more rapid exchange rate.
yes because a ratio is a rate so a rate would have to be a ratio
If the unit rate exists, it is the ratio of one variable relative to the other.
How does what differ from mass?
the rate at which a country becomes more united. (ex. it took 20 years for Mexico to be come a united country)
It is often a ratio.
No. It can be but need not be. For example, you might calculate the ratio of today's temperature in Celsius and in Fahrenheit and calculate the ratio. That is not a rate.
A percent is a ratio, or rate, that compares a number to100
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The higher the ratio, the faster the rate of diffusion
The surface area to volume ratio of a cell affects the rate of diffusion in that the higher the ratio, the faster the rate of diffusion. This is a directly proportional relationship.
A unit rate is a ratio: it does not have a solution!
The second term in the ratio is 1.