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Morgarella [4.7K]
2 years ago
10

The number of moons a planet has orbiting around it is determined by...

Physics
1 answer:
Pavlova-9 [17]2 years ago
7 0

We have no idea.  There are probably many things involved ... the planet's mass,
the availability of small bodies in the neighborhood that can be captured, etc.


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A sample of cobalt-60 has an activity of 2000 Bq. What will the activity be after 10 years? Cobalt-60 has a half life of 5 years
Luba_88 [7]

Answer:

500.3 Bq

Explanation:

From the formula;

0.693/t1/2 = 2.303/t log (Ao/A)

Where;

t1/12 = half life = 5 years

Ao = initial activity = 2000 Bq

0.693/5 = 2.303/10 log (2000/A)

0.1386= 0.2303  log (2000/A)

0.1386/0.2303 =  log (2000/A)

0.6018 = log (2000/A)

(2000/A) = Antilog (0.6018)

(2000/A) = 3.9976

A = 2000/3.9976

A = 500.3 Bq

3 0
2 years ago
A bungee jumper attains a speed of 30 m/s just as the bungee cord begins to stretch. If the period of stretch is 2 s while comin
Daniel [21]

Answer:

1.53 g

Explanation:

Given,

Initial speed = 30 m/s

Final speed = 0 m/s

Period of stretch, t = 2 s

average deceleration = ?

we know

a = \dfrac{v-u}{t}

a = \dfrac{0-30}{2}

a = -15 m/s²

Deceleration of the jumper = 15 m/s²

Deceleration in terms of g

= \dfrac{15}{9.81}

= 1.53\ g

Hence, the deceleration of the jumper is equal to 1.53 g

7 0
3 years ago
Which of the following is the best explanation of work?
Zepler [3.9K]

Answer:

D

Explanation:

5 0
3 years ago
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aniked [119]

Answer:

Convection is the heat transfer due to the bulk movement of molecules within fluids such as gases and liquids, including molten rock. Condensation is the process by which water vapor in the air is changed into liquid water. Condensation is crucial to the water cycle because it is responsible for the formation of clouds. These clouds may produce precipitation, which is the primary route for water to return to the Earth's surface within the water cycle.

Explanation:

Their a difference....... A huge One

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Explanation:

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