Jawaban:
(E) 0,87 m/s
Penjelasan:
Energi potensial awal 2 elektron
Ep₀ = k.q.q/r₀ = 9.10⁹. (1,6.10⁻¹⁹)²/(2.10⁻¹⁴) = 11,52.10⁻¹⁵ J
Energi potensial akhir 2 elektron
Ep = k.q.q/r= 9.10⁹. (1,6.10⁻¹⁹)²/(5.10⁻¹⁴) = 4,608.10⁻¹⁵ J
Selisih energi potensial
ΔEk = 11,52 - 4,608 = 6,912.10⁻¹⁵ J
Berkurangnya energi potensial ini menjadi energi kinetik untuk 2 buah elektron.
2. Ek = 6,912.10⁻¹⁵ J
2. 1/2.m.v² = 6,912.10⁻¹⁵
m.v² = 6,912.10⁻¹⁵
v² = 6,912.10⁻¹⁵/m
v² = 6,912.10⁻¹⁵/( 9,1.10⁻³¹)
v² = 0.7595604396
v = 0,87 m/s
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Jawaban:
(E) 0,87 m/s
Penjelasan:
Energi potensial awal 2 elektron
Ep₀ = k.q.q/r₀ = 9.10⁹. (1,6.10⁻¹⁹)²/(2.10⁻¹⁴) = 11,52.10⁻¹⁵ J
Energi potensial akhir 2 elektron
Ep = k.q.q/r= 9.10⁹. (1,6.10⁻¹⁹)²/(5.10⁻¹⁴) = 4,608.10⁻¹⁵ J
Selisih energi potensial
ΔEk = 11,52 - 4,608 = 6,912.10⁻¹⁵ J
Berkurangnya energi potensial ini menjadi energi kinetik untuk 2 buah elektron.
2. Ek = 6,912.10⁻¹⁵ J
2. 1/2.m.v² = 6,912.10⁻¹⁵
m.v² = 6,912.10⁻¹⁵
v² = 6,912.10⁻¹⁵/m
v² = 6,912.10⁻¹⁵/( 9,1.10⁻³¹)
v² = 0.7595604396
v = 0,87 m/s