2)
substance specific heat (j kg-1 k-1)
aluminum 900
copper 390
brass 380
silver 230
platinum 130

how many joules of heat would be required to heat 0.5 kg of aluminum by 2k?
a) 300 j
b) 450 j
c) 900 j
d) 1800 j

Ruby is conducting an investigation. an advantage of her design is that she can use a large range of variables, with that she can not be sure that one variable is the cause of another. what kind of investigation is ruby most likely conducting?