Answer:
- <u> From your frame of reference, the speed of your friend is zero.</u>
Explanation:
The<em> speed</em> from a <em>frame of reference</em> is the magnitude of the change of the position per unit of time in that frame of reference.
When it is said that, to a <em>stationary observer</em> you have a <em>speed of 9m/s</em>, it means that the observer "measures" tha your position, in a moment, changes 9 m per second.
Since both you and your friend are sit still on the same spinning merry-go-round, neither of you will change positions with respect to the other, meaning that you will perceive that your friend will not move, from your frame of reference. That is, if you are isolated from the rest of the universe, and the merry-go-round continues spining uniformly, you cannot detect any movement of your friend, which means that from your frame of reference, the speed of your friend is zero.
From Newton’s second law of motion, the value of the force is calculated by multiplying the mass and the acceleration as,
<span> F = mass x acceleration</span>
If we substitute the known values into the equation,
<span> 16 N = 80 kg x acceleration</span>
<span> Acceleration = 0.2 m/s<span>2</span></span>
In stars more massive than the sun, the core temperature is hotter, which allows for fusion of more complex elements.
Most of the fusion occurs in the core.
In stars more massive than the sun, fusion continues through Deuterium, Carbon, and finally reaching iron/nickel.
Up to this point, the fusion reaction was endothermic, which means that the energy expended to produce the fusion reaction was exceeded by the energy produced in the reaction.
Fusion past iron is exothermic, and therefore the star will be able to survive by fusing elements heavier than iron.
After the core is almost entirely iron, the star is no longer in the Main Sequence.
So, fusion in stars more massive than the sun continue fusing until the core is almost entirely <em>iron</em>.
Correct option B
Transverse waves are those waves whose particles vibrate perpendicular to the direction of wave.
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