Question

Astronomical unit (Au) is the average
distance between the earth and sun,
approximately 1.5 x 108 km. The speed of light
is about 3.0 * 108 m/s. The speed of light in
astronomical unit per minute is:
0.012 Au/min
0.12 Au/min
1.2 Au/min
12.0 Au/min​

Answer 1

Answer:

 The answer is 0.12 Au/min.

Explanation:

speed of light ⇒ c =  3 × $10^{8}$ m/s

c= 3 × $10^{5}$ km/s

c= 180 × $10^{5}$ km/min

1 Au = 1.5 × $10^{8}$ km

then  180 × $10^{5}$ km = 120 × $10^{-3}$ Au

so, c = 120 × $10^{-3}$ Au/min

c = 0.12 Au/min

hope it helps !

Answer 2

Answer:

we converts meters to astronomical unit, and second to minutes, using

Explanation:

1000m = 1 km

1Au =1.50 ×10^8 km

thus , 3.0× 10^8m/s becomes

(3.0 × 10^8m/s) × (1km /1000m) ×(Au /1.50×10^8km)× (60 s/min)

=0.12 Au/min