Longitudinal wave is a wave in which the motion of the medium's particles is parallel to the direction of the energy transport.
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>
Answer:
both
Explanation:
because science is not included in both of them
Index fossils (also known as guide
fossils, indicator fossils or zone
fossils) are fossils used to define
and identify geologic periods (or
faunal stages).
Answer:
H = 8.45 m
Explanation:
Given that,
Angle of projection,
The initial velocity of the ball, u = 20 m/s
We need to find the maximum height reached by the ball. The formula for the maximum height is given by :
So, the maximum height reached by the ball is 8.45 m.