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jonny [76]
3 years ago
7

Suppose you have made the following hypothesis:

Physics
2 answers:
OverLord2011 [107]3 years ago
6 0

Explanation:

counts of sharks observed near a reef and in a nearby section of the ocean

Blizzard [7]3 years ago
3 0

Answer:

Explanation:

You could look up the shark population near specific coral reefs. You could also go the simple route and say something like, "sharks eat fish so, sharks will go where the fish are and if there are fish in the coral reefs, (which there are) they would be most likely to go there".  I know this may not be the answer you were looking for but its the best I've got.

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How much heat energy is produced by 0.5 Wh of electrical energy ?
babymother [125]
1.7 Btu

1 watt = 3.41214 Btu/h

1watt * 1h = 3.41214 Btu/h * h

1 = 3.41214 Btu/ (watt*h)/

0.5 watt * h = 0.5 watt*h * 3.41214 Btu/(watt*h) = 1.706 Btu
6 0
3 years ago
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A satellite is orbiting earth at a distance of 35.0 kilometers. The satellite has a mass of 500 kilograms. What is the force bet
Alika [10]

Answer:

F = 4856.32 N

Explanation:

Given,

A satellite is orbiting earth at a distance from Earth surface, h = 35000 m

The mass of the satellite, m = 500 Kg

The radius of the Earth, R = 6.371 x 10⁶ m

The mass of the Earth, M = 5.972 x 10²⁴ Kg

The gravitational constant, G = 6.67408 x 10 ⁻¹¹ m³ kg⁻¹ s⁻²

The force between the Earth and the satellite is given by the formula

                                    F = GMm/(R+h)²  N

Substituting the values in the above equation

        F = (6.67408 x 10 ⁻¹¹ X 5.972 x 10²⁴ X 500) / (6.371 x 10⁶ + 35000)²

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Hence,  the force between the planet and the satellite is, F = 4856.32 N

5 0
3 years ago
A uniform disk of mass 21 kg, thickness 0.5 m, and radius 0.6 m is located at the origin, oriented with its axis along the y axi
goldenfox [79]

Answer:

29.69 kgm^2/s

Explanation:

So suppose the axis of rotation is perpendicular to the surface of the disk, then the moment of inertia can be calculated as the following:

I = mr^2/2 = 21 * 0.6^2/2 = 3.78 kgm^2

We can convert the rotation speed in term of 0.8 seconds per revolution to the angular velocity knowing that each revolution is 2π

\omega = 2\pi / 0.8 = 7.85 rad/s

Then the rotational angular momentum of the disk is:

\omega I = 7.85 * 3.78 = 29.69 kgm^2/s

In case the axis of rotation is parallel with the surface, the moment of inertia would have a formula of:

I = m(3r^2 + h^2)/12 = 21*(3*0.6^2 + 0.5^2)/12 = 2.3275 kg m^2

5 0
3 years ago
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3 years ago
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velikii [3]

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