Answer:
32 bottles
Explanation:
If we create a free body diagram on the child we have his weight and the bouyant force
W-B=0
They must be equal to mantain equilibrium on the body and he can stay floating, this force is equivalent to the weight of water displaced
W=B=Ww
Mg=mg
32 kg=mass of water displaced
1 kilogram per liter (kg/L) is the density of water, this means that 32 Liters of water are displaced and since the bottles can retain 1 liter, the child needs 32 bottles
The strength of the fireman in vertical direction will be given by F = m * g. Then, the work done will be given by definition by W = F * d. Substituting the expression of the Force in that of the work, we have that the work will be W = m * g * d. Substituting the given values and assuming that g = 10m / s ^ 2, we have a total work of W = (73) * (10) * (9) = 6570 J
A. What can happen to energy in a system is that <u>it can be </u><u>converted</u><u>.</u>
<h3>
What is the principle of conservation of energy?</h3>
The principle of conservation of energy states that energy can neither be created nor destroyed but can be converted from one form to another.
The energy of a system can be converted from one form to another.
Thus, what can happen to energy in a system is that <u>it can be </u><u>converted</u><u>.</u>
Learn more about energy conservation here: brainly.com/question/166559
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When the earth is directly between the Moon and the Sun, a Neap tide will happen along a shoreline that is facing the Sun.
In Neap tide moon is at closest distance to earth. The movement of moon cause sea storm/ tides by turbulence of waves.
Answer:
The rescue crew should fly to go directly to the field to 164.73 mi at 18.99° south of east.
Explanation:
To know the total distance, we need to use cartesian coordinates. The distance that should fly the rescue crew to the east is the decomposition of both travels on this direction, it is the same way to the travels on the another axle. So and when we have got result of both travels, we use the trigonometric identity know Arctan; to find the direction. Then we need to use the pythagorean theorem to get the distance that the rescue crew should travel; . Ordering the data we get distance 164.73 mi at 18.99° south of east.