The percent composition by mass of magnesium MgBr2 (gram formula mass= 184 grams/mole) is equal to...
2 answers:
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Explanation:
Given that:
Distance traveled = 3150m
Average speed = 350m/min
Suggested speed = 375m/min
Unknown:
Time = ?
Solution:
Speed is the rate of change of distance with time.
it is mathematically expressed as;
speed =
Initial time using speed 350m/min can be calculated by making time the subject of the formula;
time taken =
time taken at speed of speed of 350m/min = = 9min
to seconds = 9 x 60 = 540 seconds
time taken at speed of 375m/min = = 8.4min
to seconds = 8.4 x 60 = 504 seconds.
It could have taken 504 seconds sooner saving 36 seconds.
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