Answer:
1. An increase in the core temperature
2. A decrease in the core radius.
Explanation:
The sun is a Main Sequence star. A Main Sequence star is powered by fusing hydrogen into Helium within its core.
For this fusion to take place, a temperature of at least 10 million Kelvin is required, beyond this point, the fusion rate is directly related to the core temperature. If the temperature increases, the fusion rate will greatly increase.
Something similar happens if the core reduces its radius. This can happen at the end of the star's lifetime, shortly before it becomes a red giant. Once the hydrogen is depleted, the core will start to shrink because the force of gravity, and as it gets smaller, gets more compressed, and its temperature increases. The outer layers of remaining Hydrogen that were outside the core now begin to heat up, and as the core continues to shrink, the star gets hot enough to begin the fusion process again, and the fusion rate can even be higher than it was during the first phase of the star, as the star becomes a Red Giant.
Answer:
<h2>11.91 m/s</h2>
Explanation:
The velocity of an object can be found by using the formula
d is the distance
t is the time taken
From the question we have
We have the final answer as
<h3>11.91 m/s</h3>
Hope this helps you
Answer:
v = 5.6 m/s
Explanation:
Given,
The mass of the car, m = 1500 kg
The kinetic energy of the car, K.E = 23,500 J
The kinetic energy of the of an object is given by the relation,
K.E = ½ mv²
Substituting the given values in the equation,
23,500 = ½ x 1500 x v²
v² = 23500/ 750
= 31.33
v = 5.6 m/s
Hence, the K.E of the car is, v = 5.6 m/s
