Question

2.BIO Brain Growth The mass of a newborn baby's brain has been found to increase by about 1.6 mg per minute. (a) How much does the brain's mass increase in one day? (b) How much time does it take for the brain's mass to increase by 0.007s kg?

52#. On June 9 1983, the lower part of the variegated Glaciers in Alaska was observed to be moving at a rate of 210 feet per day. What is this speed in meters per second?

Answer 1

Approach used: - here we use the techniques of unit conversion for solution as shown below

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Approach used: - here we use the techniques of unit conversion for solution as shown below Rate = 1.6 times 10^-6 kg/min t = 1 day times 24 times 60 min So, increase in mass = (1.6 times 10^-6 kg/min) times (24 times 60 min) = 2.304 times 10^-3 kg/day t = 0.0075 kg/1.6 times 10^-6 kg/min = 4687.5 min w = 530.2 times 0.2 g = 106.04 g = 0.10604 kg = 0.10604 times 2.21 lb = 0.234 lb rate = 210 ft/day perpendicular feet = 0.3048 m perpendicular day = 24 times 3600 s so, rate = 210 times 0.3048m/24 times 3600 s = 7.41 times 10^-4 m/s