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8_murik_8 [283]
3 years ago
15

Explain how hydrogen is changed to helium during fusion.

Physics
1 answer:
nadya68 [22]3 years ago
7 0

Answer:

The Sun and Nuclear Fusion. In the core of the Sun hydrogen is being converted into helium. This is called nuclear fusion. It takes four hydrogen atoms to fuse into each helium atom

Explanation:

hop it helps

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Quasar spectra often show many absorption lines that all appear to be as a result of the same electron transition (such as level
Elanso [62]

Answer: Because of different redshift of cloud.

Explanation:

We are seeing absorption lines from clouds of gas that lie between us and the quasar, and therefore each cloud has a different redshift.

A quasar's spectrum is hugely redshifted. And most astronomers think this large redshift tells us about the distance to the quasar.

5 0
3 years ago
A power station burns 75 kilograms of coal per second. Each kg of coal contains 27 million joules of energy.
olasank [31]
A) P = 75 \times (2.7\times10^7) = 2.025\times10^9 W

b) Efficiency =  \frac{8\times10^8}{2.025\times10^9} \times 100 \approx 39.5\%
4 0
3 years ago
Read 2 more answers
A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 44.1m/s^2 . The acce
ollegr [7]
The acceleration and distance is related to the following expression:
y=v0*t + a*t^2/2 ; v0=0 
y=44.1*100/2 = 2205m 
hence, the speed will be 
v=0 + a*t = 441m/s 
from that height it will just be subjected to the gravitational acceleration 
0=v_acc^2 -2g*y_free 
y_free = v_acc^2/2g = 9922.5m 
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7 0
3 years ago
What are possible units of speed and velocity
beks73 [17]
Posiible units of speed and velocity aare miles per hour
8 0
3 years ago
Please help on this one?
lisov135 [29]

Answer:

The current in a resistor decreases by a factor of 4.

Explanation:

I = \frac{E}{R}

Where (I) is the current, (E) is the voltage and (R) is the resistance.

Decreasing the voltage by 4 gives;

I = 0.25\frac{E}{R}

Since you have multiplied \frac{E}{R} by 0.25,

You have to multiply I by 0.25 so the current decreases by a factor of 4.

3 0
3 years ago
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