Why do many scientists work in groups? a.
To generate new ideas
c.
Because it is too expensive to work on their own
b.
To make sure that the work is accurate
d.
So there is always someone in lab to monitor experiments

Estimate the kinetic energy of mars with respect to the sun as the sum of two terms, that due to its daily rotation about its axis, and that due to its yearly revolution about the sun. (assume mars is a uniform sphere with mass = 6.4×10 to the power of 23 kg, radius = 3.4×10 to the power of 6 m, rotation period = 24.7 hours, orbital period = 686 days and is 2.3×10 to the power of 8 km from the sun.)