For a few hours, some satellites experienced electrical failure and at the same time, radio communications at high latitudes were also disrupted. Which is an astronomer most likely to predict was the cause? A. solar flares
B. solar energetic particles
C. coronal mass ejections
D. a geomagnetic storm

idk but if i had to take an educated guess i’d say a c d

1. aspect is nothing really because the answer is right in front of your face

This movement is also referred to as  glacial plucking

It depends on the surface of the levels. the rougher the surface, the greater is the frictional force. for rougher surfaces, you would need to exert greater force to move the object. the concept is that, you must overcome the frictional force in order to bring the object into motion. this is the reason why we add lubricants to the joints so they could easily move. this answer was on