Answer:
Explanation:
Given Data:
rest wavelength = λ₀=121.6nm
Star A wavelength = λa=120.5nm
Star B wavelength = λb=121.2nm
Star C wavelength = λc=121.9nm
Star D wavelength = λd=122.9nm
According to Doppler shift formula,
we have
v/c=(λ-λ₀)/λ₀
As we know c=speed of light=3*10^8m/s⁻¹
a.
Star A: v=(120.5-121.6)(3*10^8)/121.6 = -2.71*10^6m/s(towards)
Star B: v=(121.2-121.6)(3*10^8)/121.6 = -9.87*10^5m/s(towards)
Star C: v=(121.9-121.6)(3*10^8)/121.6 = 7.40*10^5m/s(away)
Star D: v=(122.9-121.6)(3*10^8)/121.6 = 3.21*10^6m/s(away)
b.
Star D is moving fastest relative to us.
By the early 2000s the United States was the country that was Taiwan's third-largest trading partner.
Number one is his city is being threatened bye rising sea levels due to global warming.
#2 is because carbon is one of the leading green house gasses so fi we cna lessen that then it will help global warming<span />
Answer:
Letter B. would be the best answer
Explanation:
They live on the bottom of the oean.
Answer:
Singapore (Singapore Changi Airport)
However, Hopper's team has discovered that the Singapore Changi Airport is currently amongst the cheapest arrival points in all of Southeast Asia, boasting an average flight price of around just $896 round trip.
Explanation:
To be COMPLETELY honest, I am not sure. If you REALLY want to know, do some more research!
-Army
Even if my answer didn't help you, I would LOVE it if you marked my as brainliest! Take care and have a good day! <3