All categories

3 years ago

What three tests must all theories pass to be considered a proven theory?

1 answer:

4 0

In order to become a scientific theory the three categories that it must pass are the following:
1) Can the phenomena be recreated in a laboratory setting?
2) Can variables be changed, yet still result in like observations?
3) Is the phenomena truly natural or was it the result of a man-made force enacting upon it?

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What is the difference in PE

Blababa [14]

Answer:

831.4 J

Explanation:

Info given:

mass adult: 82.5kg

mass child: 14.7kg

height of wall: 1.25m

g = 9.81m/s^2

PE = mgh

For adult:

mgh = (82.5kg)(9.81m/s^2)(1.25m) = 1011.65 J

For child:

mgh = (14.7kg)(9.81m/s^2)(1.25m) = 180.25 J

Difference in PE: 1011.65 J - 180.25 J = 831.4 J

3 0

2 years ago

If a forcé has a negativa values such as -100N, that means

Lisa [10]

Its negative
:)))))))))))))

6 0

3 years ago

8. do the earth and the moon always cast shadows? what do we call the occurrence where the earth passes within the shadow of the

Oduvanchick [21]

Yes, they both cast shadows. A eclipse occurs when one enters the shadow of the other.

Solar eclipse: Earth in shadow of Moon.

Lunar eclipse: Moon in shadow of Earth.

A solar eclipse is the result of one celestial body being completely or partially obscured by another celestial body along the line of sight of an observer. A solar eclipse occurs when the moon passes between the earth and the sun, obscuring all or part of the sun's disk. A lunar eclipse occurs when the Moon passes through the Earth's shadow, making the Moon's surface completely or partially obscured.

Learn more about solar:

https://brainly.in/question/5629706

#SPJ4

8 0

1 year ago

Most of the resistance of the human body comes from the skin, as the interior of the body contains aqueous solutions that are go

PIT_PIT [208]

Answer:

4.81x10³ Ω*m

Explanation:

The resistivity (ρ) of the skin can be calculated using the following equation:

$\rho = R\frac{A}{l}$

Where:

R: is the electrical resistance of the skin = 500x10³ Ω

A: is the cross-sectional area of the skin

l: is the length of the skin= 1.6 m

Since we can model the body between the hands as a cylinder, the cross-sectional area is:

$A = \pi r^{2} = \pi \frac{d^{2}}{4} = \pi \frac{(0.14 m)^{2}}{4} = 1.54 \cdot 10^{-2} m^{2}$

Now, we can fin the resistivity (ρ) of the skin:

$\rho = R\frac{A}{l} = 500\cdot 10^{3} \Omega \frac{1.54 \cdot 10^{-2} m^{2}}{1.6 m} = 4.81 \cdot 10^{3} \Omega m$

Therefore, the resistivity of the skin is 4.81x10³ Ω*m

I hope it helps you!

5 0

2 years ago

Kinetic energy of a body is increased by by 300% what is percentage increased in momentum

MAXImum [283]

Answer

100% - double

200% - triple

300% - 4X

For a 300% increase the KE must be 4 time as large

KE2 / KE1 = M V2^2 / M V1^2 = (V1 / V2)^2 = 4

So V2 = 2 V1 for the requested increase

M V2 / M V1 = V2 / V1 = 2

So the momentum would double for a 100% increase

3 0

2 years ago