Explain the significance of the center of gravity. What will ...

[Medesa]

Explain the significance of the center of gravity.
 
  What will be an ideal response?

Question 2

Silver has a Fermi level (energy) of 5.5 eV. At 0 K, at what speed would the electrons be moving if they had kinetic energy equal to the Fermi energy?
 
  (This speed is known as the Fermi speed.) (mel = 9.11  10-31 kg, 1 eV = 1.60  10-19 J, h = 6.626  10-34 J  s)
  A) 1100 km/s B) 1400 km/s C) 2.2 km/s D) 1.0 km/s E) 3.5 km/s

[matt95]

Answer to Question 1

The center of gravity of an object is that point at which the force of gravity can be considered to act. The force of gravity actually acts on all the different parts or particles of an object, but for purposes of determining the translational motion of an object as a whole, it is safe to assume that the entire weight of the object acts at the center of gravity.

Answer to Question 2

B

[Medesa]

Gracias!

[Viet Thy]

Excellent