Several days after a snowfall, the roofs of some homes on your street have almost no snow on them, while the roofs on other homes are still covered. assuming they all have received the same amount of sunlight, give one reason for this observation related to thermal energy & insulation.

Mike walks 100 meter north, then walks 30 meters south. after this, he walks another 10 meters north. what is the magnitude of his total displacement during this walk, in meters?

The place you get your hair cut has two nearly parallel mirrors 6.00 m apart. as you sit in the chair, your head is 2.00 m from the nearer mirror. looking toward this mirror, you first see your face and then, farther away, the back of your head. (the mirrors need to be slightly nonparallel for you to be able to see the back of your head, but you can treat them as parallel in this problem.) how far away does the back of your head appear to be?

Will you chech and finish these for me, because i am stumped with them.