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ra1l [238]
2 years ago
9

How much water makes up earth in percentages? thx?

Physics
1 answer:
Bond [772]2 years ago
7 0

Answer:

71%

Explanation:

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What specific structures are in electroreceptors?
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Electroreception is limited to aquatic environments because on here is the resistivity of the medium is low enough for electric currents to be generated as the result of electric fields of biological origin.  In air, the resistivity of the environment is so high that electric fields from biological sources do not generate a significant electric current.  Electroreceptor are found in a number of species of fish,  and in at least one species of mammal,  the Duck-Billed platypus.
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3.) An engineer is designing the runway for an airport. Of the planes that will use the airport,
scoray [572]

Answer: 704

Explanation:Vi = 0 m/s

vf = 65 m/s

a = 3 m/s2

d = ??

vf2 = vi2 + 2*a*d

(65 m/s)2 = (0 m/s)2 + 2*(3 m/s2)*d

4225 m2/s2 = (0 m/s)2 + (6 m/s2)*d

(4225 m 2/m2)/(6 m/s2) = d

d = 704 m

5 0
2 years ago
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A hammer of mass m falls from rest off of a roof and drops a height H onto your head.
belka [17]
For conservation of energy we have to:
 mgH=mv²/2 
 Clearing
<span> v=sqrt(2gH)
 Then, by definition 
</span><span> F=Δp/Δt= Δ(mv)/ Δt=m Δ(v)/Δt= 
</span> =m[sqrt(2gH)-0]/Δt= m[sqrt(2gH)]/ Δt
 the answer is
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6 0
3 years ago
Puede un sistema funcionar sin alguna de sus partes? por que?
Goshia [24]

Answer:

los sistemas de organos presentes en su cuerpo son los sistemas circulatorio, respriatorio, muscular, digestivo, tegumentario, endocrino, reproductivo y nervioso. Todos estos sistemas tienen funciones especificas pero no pueden funcionar de forma independiente. Dependen de todos los demas sistemas para funcionar correctamente.

Explanation:

espero que esto ayude.

5 0
3 years ago
You and your friend throw balloons filled with water from the roof of a several story apartment house. You simply drop a balloon
ivann1987 [24]

Answer:

74.529 m

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.8 m/s²

For first ball

s=ut+\frac{1}{2}at^2\\\Rightarrow s=0\times t+\frac{1}{2}\times 9.8\times t^2\\\Rightarrow s=4.9t^2\ m

For second ball

s=ut+\frac{1}{2}at^2\\\Rightarrow s=50.96\times (t-2.6)+\frac{1}{2}\times 9.8\times (t-2.6)^2\\\Rightarrow s=25.48t-99.372+4.9t^2

As the displacement is equal

25.48t-99.372+4.9t^2=4.9t^2\\\Rightarrow t=\frac{99.372}{25.48}\\\Rightarrow t=3.9\ s

s=4.9\times 3.9^2=74.529\ m

So, height of the building is 74.529 m

3 0
2 years ago
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