I think it is maria but i am more sure than wondering
Answer:
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calcium (Ca) : alkaline earth metal .
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gold (Au) : transition metal .
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iron (Fe) : transition metal .
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magnesium (Mg) : alkaline earth metal .
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plutonium (Pt) : transition metal .
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sodium (Na) : alkali metal .
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uranium (U) : inner transitional element .
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Answer:
The correct answer is 1 joule.
Explanation:
Answer:
#_time = 7.5 10⁴ s
Explanation:
In order for the astronaut to be younger than the people on earth, it follows that the speed of light has a constant speed in vacuum (c = 3 108 m / s), therefore with the expressions of special relativity we have.
t =
where t_p is the person's own time in an immobile reference frame,
let's calculate
we assume that the speed of the space station is constant
t_ = 0.99998666657 s
therefore the time change is
Δt = t - t_p
Δt = 1 - 0.9998666657
Δt = 1.3333 10⁻⁵ s
this is the delay in each second, therefore we can use a direct rule of proportions. If Δt was delayed every second, how much second (#_time) is needed for a total delay of Δt = 1 s
#_time = 1 / Δt
#_time =
#_time = 7.5 10⁴ s