The speed of flight is now defined to be 2.997 924 58 * 10^8 m/s, Express the sp

Question

The speed of flight is now defined to be 2.997 924 58 * 10^8 m/s, Express the speed of Light to Three significant figures Five significant figures, Seven significant figures The triangle is right triangle which three sides are a, squreroot 3a, and 2a, the angle corresponding To 2a is its right angle (90 degree), find the angle corresponding to a, find the angle Corresponding to squreroot 3a. A speed of 7 mum/ns is equal to 7000 m/s 70 m/s 7 m/s 0.07 m/s An airplane is going to lading, its touchdown velocity, v_0 = 72.5 m/s, t_0 = 0, then it starts to apply brake and use reverse thrust of engine, by doing these, the airplane obtain the deceleration of a = -4.27 m/s. When if fully stops, v_f = 0, what is the braking distance? And how long it takes the airplane fully stop?

Explanation / Answer

here,

speed of light , c = 2.99792458 * 10^8 m/s

a)

for three significant figures

round off to three significant figures

c = 3.00 * 10^8 m/s

b)

for five significant figures

round off to five significant figures

c = 2.9979 * 10^8 m/s

c)

for seven significant figures

round off to seven significant figures

c = 2.997925 * 10^8 m/s

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