They reach 1/2 their adult height around age two.
False. The father's chromosomes decide weather the child is male or females.
humans are born with nearly 300 bones
Answer:
v = -8.05 * 10⁷ ms⁻¹
Explanation:
Using the non-relativistic Doppler effect, which is the change in frequency of a wave as detected by an observer who's moving relative to the wave source. The shifted wavelength is:
λₓ = λ₀ (1 + v / c₀)
where λ₀ is the wavelength from the source, v is the velocity of the source (the quasar) and, c₀ is the velocity of the wave which is equivalent to the speed of light, c.
Making v subject of the formula;
v = c₀ (λₓ / λ₀ - 1)
λₓ = 279.8 * 10⁻⁹ m, λ₀ = 382.5 * 10⁻⁹ m, c = 3.0 * 10⁸
v = 3.0 * 10⁸ {(279.8 * 10⁻⁹ m / 382.5 * 10⁻⁹ m ) - 1}
v = -8.05 * 10⁷ ms⁻¹
The velocity of the quasar is negative because it is getting close to the Earth!
