Answer:
The correct answer is 150 kilograms.
Explanation:
Based on the given information, the ratio of zinc and copper within the alloy is 2:5. The amount of zinc used in the alloy is 60 kg. Now the amount of copper used within the alloy would be,
Zinc/Copper = 2/5
60/Copper = 2/5
Copper(Cu) = 60*5/2
Cu = 150 Kilograms.
Thus, the amount of Cu used in the alloy is 150 Kg.
Answer:
Faster hydrogen burning means the star will grow larger and more luminous to allow the extra energy created to escape
Answer:
793 kJ
Explanation:
Given that :
Then; the heat needed to convert solid from is calculated as:
Also;
Now; the heat required to convert solid to liquid at is;
= 3.069 × 20500
= 62914.5 J
Also ; given that :
Then the heat needed to convert liquid from to is;
∴ The total heat required =
= (715008 + 62914.5 + 15002.4) J
= 792924.9 J
= 793 kJ