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ly = light yearsStars P and Q have the same luminosity, but P is 30 ly from Earth and Q is 40 ly from Earth. What is the ratio
1. 2 answers
2. 433 views
Star A is four times as far away as star B, but they have the same luminosity. Which appears brighter from Earth. and by how
1. 2 answers
2. 2,260 views
The decay of uranium is modelled byD = D_0 * 2^(-kt). If it takes 6 years for the mass of uranium to halve, find the percentage
1. 2 answers
2. 868 views
In a controlled breeding program at Melbourne Zoo, thepopulation (P) of koalas at t years is modeled by P = P_0 * 10^(kt). Given
1. 2 answers
2. 717 views