Answer: The Answer is minus 221kj.
Explanation: Solved in the attached picture.
Because diamond is hard to melt
~~~hope this helps~~~
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~davatar~
Answer:
I think that the first one is right(A)
I’m not quite sure but it’d probably be solar panels
Answer:
~1.5 g/cm3 and it does NOT float in water.
Explanation:
If you look at the graph, Object A weighs ~6 grams and is ~4 cm3 in volume
Density = Mass/Volume
So 6 grams/4 cm3 = 1.5 g/cm3
Water has a density of 1 g/cm3 and because Object A density is higher than that of water, it sinks.
:)