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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 many neutrons does element X have if its atomic number is 48 and its mass number is 167?
Llana [10]
If its atomic number is 48, then it has 48 protons in the nucleus
of each atom.  Any more mass than that is supplied by the neutrons
that are mixed in there with the protons.

If the mass is 167, and 48 of those are protons, then there are

             (167 - 48)  =  119 neutrons

in each nucleus.

8 0
3 years ago
A gas undergoes two processes. In the first, the volume remains constant at 0.200 m3m3 and the pressure increases from 2.50×105
SVETLANKA909090 [29]

Answer:

W = -4.95 \times 10^4\ J

Explanation:

given,

In first case Volume remains constant.

Work done in the first case is zero.

In Second case Volume change

V₁ = 0.2 m³

V₂ = 0.11 m³

Pressure, P = 5.5 x 10⁵ Pa

Work done = Pressure x change in volume

W = P ΔV

W = P(V_2-V_1)

W = 5.5\times10^5\times (0.11 - 0.2)

W = -4.95 \times 10^4\ J

Hence, Work done when volume changes is equal to W = -4.95 \times 10^4\ J

5 0
3 years ago
If an area has all the wolves that it can support the wolf population has reached is what
Liono4ka [1.6K]
The wolf population in that area has reached its carrying capacity.
7 0
3 years ago
Read 2 more answers
1 point
Trava [24]

Answer:

Their number should increase

Explanation:

The photoelectric effect is a phenomenon that causes the ejection of electrons from that metal as light shined onto a metal surface. Only certain frequencies of light can cause the ejection of electrons. However, if the frequency of the incident light is too low then no electrons were ejected even if the intensity of the light was very high. If the frequency of the light was higher then electrons were able to be ejected from the metal surface even if the intensity of the light was very low.

According to the accepted wave theory, light of any frequency will cause electrons to be emitted. Kinetic energy emitted by the electrons depends upon the intensity of light.

According to the accepted wave theory, number of electrons being ejected by the metal should increase

5 0
3 years ago
Can somebody tell me what time is it
kodGreya [7K]

Answer:

8:21am

Explanation:

I hate stupid school

5 0
3 years ago
Read 2 more answers
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