Name the force that keeps a probe in orbit around Mars.
An environmental monitoring probe moves in a circular orbit around Mars. Its altitude above the Martian surface is 1250 km1250\text{ km}1250 km.
The radius of Mars is 3390 km3390\text{ km}3390 km. Calculate the radius of the orbit of the probe in km\text{km}km.
The probe completes one full orbit in 148 minutes148\text{ minutes}148 minutes. Calculate its orbital speed in m/s\text{m/s}m/s. Give your answer to 3 significant figures.
A different scientific instrument is in an eccentric elliptical orbit around Mars. Its distance from Mars and its speed change as it orbits. It travels fastest when it is closest to Mars. Use ideas about energy to explain why.
The probe's sensors detect ultraviolet radiation and X-rays from solar flares.
Name the family of waves to which both ultraviolet radiation and X-rays belong.
State two differences between ultraviolet radiation and X-rays.
