Question

$\huge\mathtt\red{Challenge \: to \: brainly \: moderators}$
SPAM = 10 ANSWERS REPORT
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Answer 1

Initial Velocity($u$) $=5 \times {10}^{14} \: m{s}^{-1}$

Final Velocity($v$) $= 2u$

Acceleration($a$) $= {10}^{4} \: m{s}^{-2}$

(i) Using Kinematical Equation,

$v = u + at$

$2u = u + at$

$u = at$

$5 \times {10}^{14} = ( {10}^{4} )t$

$\implies \boxed{t = 5 \times {10}^{10} \: s}$

(ii) Using Kinematical Equation,

${v}^{2} - {u}^{2} = 2as$

${(2u)}^{2} - {u}^{2} = 2as$

$3 {u}^{2} = 2as$

$3 {(5 \times {10}^{14}) }^{2} = 2( {10}^{4} )s$

$\dfrac{3}{2} \times \dfrac{25 \times {10}^{28} }{ {10}^{4} } = s$

$\implies \boxed{s = 3.75 \times {10}^{25} \: m}$