Acluster of galaxies has a radius of about 4.8 million light-years (4.5×1022 m ) and an intracluster medium with a temperature of 6.0×107 k . [hint: consult mathematical insight 23.3.]
1) estimate the mass of the cluster. give your answer in both kilograms and solar masses. suppose the combined luminosity of all the stars in the cluster is 7.5×1012 lsun .
express your answer using two significant figures.
m=
2) express your answer using two significant figures.
m=
3) what is the cluster's mass-to-light ratio?
express your answer using two significant figures.

According to newtons universal law of gravitation, which would change the parh of the ball so it traces out widest curved path possible?

All the simple machines make work easier to do by changing the or of a force. a. size; type b. work; type c. size; direction d. type; direction

Wo small variable-thrust jets are actuated to keep the spacecraft angular velocity about the z-axis constant at ? 0 = 1.16 rad/s as the two telescoping booms are extended from r1 = 1.18 m to r2 = 4.69 m at a constant rate over a period of 124 seconds. the small 19-kg experiment modules at the ends of the booms may be treated as particles, and the mass of the rigid booms is negligible. determine the necessary thrust t for each jet as a function of time where t = 0 is the time when the telescoping action is begun. after you have the general expression for t, answer the questions. show work.