9. two twin boys are playing outside on a hot, sunny day. one of the twin boys is wearing a black shirt
and the other, a white shirt. the twin in the black shirt feels warmer. explain why.

If a || b and e || f, what is the value of y ?

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

Suppose that during that icy hot lab 65,000 j of energy were transferred to 450 g of water at 20°c what would have have been the final temperature of the water