Acarpenter sands a wooden board until it is smooth. is this a physical or a chemical change?

This is a physical change. Because he is not changing what it is just its outward appearance. hope this helped.

Hypothesis: volumes of both figures are equal.the volume of  figure 1 is: .the volume of figure 2 is: .since , you can conclude that and . so, .volumes of figures are equal only when an angle in the basis is right (then figures will be the same), in another cases volume of figure 1 is less than volume of figure 2.the hypothesis was not correct in all cases.

Imean it could be either both i get why it could be part of being human because some people just look at the famous people and they probably think to themselves that if that person does that well then i should do it and maybe i’ll get the attention and followers that i want. it could be also connected to the current young phenomenon because some kids at the age of 14 are already famous like for doing the most nasty things probably without even thinking who would probably watch such thing, they just do it cause they know they’ll get the attention that they want. sorry if i didn’t use correct grammar.but hope this answers the question< 3