what is the apparent mass of a 5.9x10^3 kg alien spacecraft traveling at 0.84c?
possible answers: 3.2x10^3 kg, 5.9x10^3 kg, 1.1x10^4 kg and 2.2x10^4kg
回答 (3)
Apparent mass, m
= mₒ / √[1 - (v/c)²]
= (5.9 × 10³) / √[1 - (0.84c/c)²] kg
= 1.1 × 10⁴ kg
The answer: 1.1 × 10⁴ kg
Ma = Apparent mass
Mr = Real mass
Mr=λMa
λ = 1 / (1 - (v/c)^2)) - > 1/(1-(0.84)^2))
λ = 2.77
so 5.9X10^3kg / 2.77 = 2.2x10^4kg ( rounded up from 2.129x10^4 kg )
收錄日期: 2021-04-24 01:04:13
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