If the lattice constant of silicon is 5.43 å, calculate (a) the distance from the center of one silicon atom to the center of its nearest neighbor, (b) the number density of silicon atoms (#/cm"), and (c) the mass density (g/cm) of silicon.

An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above

What is a subatomic particle with a negative charge and very little mass?

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?