While we think that our planets formed through the process of core collapse, planets around other stars might or might not have formed from the process of disk instability. Which of the following would make disk instability MORE LIKELY to have occurred around a star? ---

A hotter disk of material

A more massive disk

A more massive star

A larger fraction of solid material in the disk

A previously formed planet

None of these would make disk instability more likely

3. a worker pushes a 30.5 kg polished stone along a polished table with a force on bonin a straight line for 5.20 s after starting from rest. there is no friction between thestone and the table. at the end of the table. the stone is hooked to a cable with a lengthof 62.0 cm to rotate it to a rough table to store until they can be picked up. the roughtable has a coefficient of static friction 0.702 with the polished stone. remember that 8= 9.80 m/s2a) what is the speed of the stone when it is hooked to the cable? b) what is the tension in the cable while the stone is rotating? (there is still nofriction)c) how much force is needed to make the stone begin sliding from rest on therough table? ius = 0.70262.0 cm30.5 kg20.5 kg6= 0