The robotic rover Curiosity has instruments that detect radiation both inside the spacecraft and in the Mars environment. What i
s most likely the purpose of this radiation detection? to determine whether human exploration of Mars is possible
to develop better X-ray technology
to find evidence of once-living Martian microorganisms
to investigate evidence of hydrogen and water
The planet Mars has two moons. Phobos and Delmos (i) phobos has period `7` hours, `39` minutes and an orbital radius of `9.4 xx 10^(3) km`. Calculate the mass of Mars. (ii) Assume that Earth and mars move in a circular orbit around the sun, with the martian orbit being `1.52` times the orbital radius of the Earth. What is the length of the martian year in days? `(G = 6.67 xx 10^(-11) Nm^(2) kg^(-2))`
