Copper, because it has the lowest specific electrical resistance.
specific electrical resistance aka volume resistivity is a fundamental property of a material that quantifies how strongly that material opposes the flow of electric current. A low resistivity indicates a material that readily allows the flow of electric current.
        
             
        
        
        
Since force = mass X acceleration, then the force he excerts on the earth (aka his weight) equals his mass times the force of gravity. 
Therefore 
W = (66 kg) X (9.8 m/ss) 
W = 646.8 kgm/ss 
kg m/ss are also known as Newtons, so your answer is... 
646.8 N
        
             
        
        
        
Answer:
Both are true under specific circumstances. And are related to Boyle's law. volume and pressure in a gas are inversely proportional.
Explanation:
There is a tendency to entropy in our reality, that is, in particular true and visible with gases, they tend to occupy the whole space where they are confined, when we heat a volume of gas, then the movement of the particles and in consequence the pressure of the gas increases and to compensate this the volume tends to be increased too, according to Boyle's law. And the opposite happens when the volume is increased, then the pressure is  relieved and since the particles are further one from each other, then the temperature is lower, and therefore it cools down.
 
        
             
        
        
        
Elements with the largest atomic radius are found in the lower left hand of the periodic table.
        
             
        
        
        
Answer:
Energy
A wave is a disturbance that carries energy from one place to another through matter and space.
Explanation:
A wave can be defined as a form of disturbance that carries energy from one place to another through matter and space. 
The energy of wave depends on the frequency of the wave and the wavelength (lambda) of that particular wave.
Mathematically, 
V = f × lambda