Question

Convert (i) 3 m.s –2 to km h –2 (ii) G = 6.67 × 10 –11 N m 2 kg –2 to cm 3 g –1 s –2.

Answer 1

Explanation:

3.8880 × 104 km h–2 = 3.9 × 104 km h–2 ii G = 6.67 × 10–11 N m2 kg–2 = 6.67 × 10–11 kg m s–2 m2 kg–2 = 6.67 × 10–11 kg–1 m3 s–2 = 6.67 × 10–11 1000 g–1 100 cm3 s–2= 6.67 × 10–11 x 1/1000 x 100 x 100 x 100 g–1 cm3 s–2 = 6.67 × 10–8 g–1 cm3 s–2.