The colour of copper sulphate solution is blue
Answer:
, 
Explanation:
The change in energy is given by the change in gravitational potential energy:



The average rate of change in terms of time is approximately this:



Answer:more
Explanation:
more or less can help you
The atomic mass number of the unknown nucleus is 128.
The relationship between the radius of the nucleus r and the atomic mass A is given by

If we assume that the nucleus is a sphere, the volume V is

let the volume of the nucleus having atomic mass number of 64 be V, then the volume of the unknown nucleus having atomic mass number A is written as

Thus, we find that the atomic mass number of the unknown nucleus is A=128
Learn more about atomic mass nuclear charge:
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Answer:
D) Heat flows from the copper cube to the iron cube.
Step-by-step explanation:
The reason comes from the second law of thermodynamics:
Heat energy will flow spontaneously from an area of high temperature to one of low temperature.
When you bring two objects of different temperature into contact, heat energy always moves from the hotter to the cooler object.
The copper cube is hotter than the iron, so heat flows from the copper cube to the iron cube.
here hope this helps