A car is traveling at 20 minutes/second and is brought to rest by applying brakes over a period of 4 seconds.What is it average
1 answer:
-5m/s
Explanation:
Given parameters:
Speed of the car = 20m/s
Time taken = 4s
Unknown:
Average acceleration = ?
Solution:
Acceleration is the change in velocity or speed with time of a body.
Acceleration =
v is the final velocity = 0
u is the initial velocity
t is the time
Input the values:
Acceleration =
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Answer:
Explanation:
Conversion problems could be solved using dimensional analysis for convenient use and understanding. Dimensional analysis is a technique of multiplying the measure we have by a fraction corresponding to some two equal measures in different units.
In order to apply dimensional analysis here, we firstly need to know that a prefix 'n' stands for 'nano', and nano means . In this case, we have nanoliters. Using the prefix, we can find a relationship between nanoliter and liter:
We may now apply dimensional analysis. Since we wish to convert into liters, we'll be multiplying the number we have in nL by a fraction that contains this relationship with liters in the numerator and nanoliters in the denominator, so that nL terms cancel out and we would obtain the final answer in liters: