Vị thế xã hội thay đổi vai trò xã hội không đổi có thể quy về các loại cơ động xã hội nào ? Vì sao ?

24-karat gold is considered to be pure gold. 18-karat gold is considered to be about 75% gold. what is 18-karat gold considered a mixture rather than a pure substance? a) it has a variable composition of other elements and minerals. b) its color is different than pure gold. c) the gold atoms are not arranged in a repeating pattern. d) it can be melted and transformed into a different substance.

Which features are created on the exterior of a volcano when it erupts? check all that apply. vent crater hot spot lava flow boundary

Calculate the iq of a 20 year old who has the mental age of 25