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lana [24]
3 years ago
9

Which of the following statements best describes earths mineral resources

Physics
2 answers:
bulgar [2K]3 years ago
8 0
It is D, you can not replace minerals. This makes them valuable.
prohojiy [21]3 years ago
3 0
It's B. Valuable and non-renewable. Their valuable because they can't be renewed.
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How does inertia affect a person who is not wearing a seatbelt during a collision?
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When the car stops, inertia causes the person to continue forward at the speed of the car prior to stopping
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Korolek [52]

Answer:

f = pl / (l + p)

Explanation:

1/f = 1/p + 1/l

Find the common denominator of the right hand side.

1/f = l/(pl) + p/(pl)

Add:

1/f = (l + p) / (pl)

Take the inverse of both sides:

f = pl / (l + p)

6 0
3 years ago
What is the speaker’s power output if the sound intensity level is 102 dBdB at a distance of 25 mm ? Express your answer to two
lesya [120]

Answer:

Power  = 124.50 W

Explanation:

Given that:

The Sound intensity of a speaker output is 102 dB

and the distance r = 25 m

For the intensity of sound,

\beta (dB)= 10 \  log_{10 } (\dfrac{I}{I_o})

where;

the threshold of hearing   I_o = 10^{-12} (W/m^2)

\dfrac{102 }{10}= log_{10}( \dfrac{I}{10^{-12}})

10^{10.2} =  \dfrac{I}{10^{-12}}

I = 10^{10.2} \times 10^{-12}

I = 0.01585 W/m²

If we recall, we know remember that ;

Power = Intensity × A rea

Power = 0.01585 W/m² × 4 × 3.142 × (25 m)²

Power  = 124.50 W

7 0
3 years ago
What would happen to the moon if there was no sun and earth ?
iragen [17]

Answer:

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Explanation:

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