1. If temperature is increased, the number of
collisions per second

If temperature increases, the number of collisions per second also increase because particles absorb energy.

hope this way the kind of answer you were looking for:)

they it depends on if one believes about radioactivity, they make a geiger counter beep but maybe it was going to beep anyway electronics do wierd things all the time or it was programmed to beep near certain metals.

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.