Resposta :
Resposta:
A)
[tex]e = \frac{k \times q}{d {}^{2} } \\ e = \frac{9 \times 10 {}^{9} \times - 5 \times 10 {}^{ - 6} }{4 \times 10 {}^{ - 2} } \\ e = \frac{ - 45 \times 10 {}^{3} }{4 \times 10 {}^{ - 2} } \\ e = \frac{45 \times 10 {}^{5} }{4} \\ e = 11.25 \times 10 {}^{5} [/tex]
B)
[tex]f = \frac{k \times q}{d {}^{2} } \\ f = \frac{9 \times 10 {}^{9} \times 4 \times 10 {}^{ - 6} }{4 \times 10 {}^{ - 2} } \\ f = \frac{36 \times {10}^{3} }{4 \times 10 {}^{ - 2} } \\ f = 9 \times 10 {}^{5} [/tex]