Question

A particle has a velocity that is 90 of the speed of light

Answer 1

Solution

speed of light(c)=3×10^8 m/sec

now...

$</u><u>Speed\</u><u>:</u><u> of </u><u>\</u><u>:</u><u> </u><u>particle</u><u>(</u><u>v</u><u>)=</u><u> 90 \: percent \: \: of \: \: c \\ = \frac{90}{100} \times 3 \times 10 {}^{8} \\ = 2.7 \times 10 {}^{8} </u><u>\: \: m.s {}^{ - 1}$