Reflect parallel of the principal axis
The best answer for this question is generally the best period to look for crabs is for the duration of the full moon, this is as a result of most invertebrates being nocturnal and being more effortlessly spotted and being fascinated to light sources.
Answer:
Force is equal to the change in momentum per change in time.
Explanation:
That situation is described by Newton's Second Law of Motion. According to NASA, this law states, "Force is equal to the change in momentum per change in time. For a constant mass, force equals mass times acceleration." This is written in mathematical form as Force = mass.
Answer:
<em>Sara must climb 10609 stairs to burn this food.</em>
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Explanation:
Chemical energy content in Sara's body = 788 kCal x 4.184 = 3296.99 kJ = 3296990 J
her body is only 25% effective in converting chemical to mechanical energy, therefore,
available mechanical energy = 25% of 3296990 = 0.25 x 3296990 = <em>824247.5 J --this is equivalent to the work she must do to burn this stored energy</em>
flight of stairs = 12 cm = 0.12 m
Sara's mass m = 66 kg
Sara's weight = mg = mass x acceleration due to gravity 9.81 m/s^2
weight W = 66 x 9.81 = 647.46 N
work done = force x distance climbed d
putting in the necessary values, we have
824247.5 = 647.46 x d
d = 1273.05 m
the number of stairs Sara must climb is equal to the distance climbed divided by the height of a single stairs
number of stairs = 1273.05/0.12 = 10608.75 ≅ <em>10609 stairs</em>
