Question

Chapter 4 Work &
(D) 980 J
(C) 98 J
(D) 2.6 MB
(D) 2.45 k wat
2006
(D) Sixteen tin
(D) 8 ms
(D) charge
oxforque
(A) 490 J
(B) 49 J
1 kWh is equals to
(A) 3.6x10°
(B) 3.6 MJ
(C) 4.6 MJ
The power needed to lift a mass of 50dog to height of 1 min 2 second is:
(A) 2.45 watt
MeY24.5 watt
(C) 245 watt
If the velocity of an object is double then its K.E. becomes:
(A) Double
(B) Constant
vel Four times
If the momentum of a body is numerically equal to its kinetic energy, then speed of body is:
(A) 1 ms-
Terms-
(C) 4 ms -1
Mass is highly concentrated form of:
(A) inertia
\By energy
(C) plasma
The dimension of Kinetic energy is similar to that of
(A) Pressure
(B) Power
(C) Momentum
MCQ's Keys
2.
D 5. A 6. A
10. B
11.
D
12.
B 13.
с
14. B
19.
AC 듣
7.
15
4.
с
3.
A
с
C
D
for absolute P.E. of body of me​

Answer 1

Answer:

We present a comprehensive investigation of acceptor impurities in GaN, based on first-principles total-energy calculations. Two main factors are identified that determine acceptor incorporation: the strength of chemical bonding between the acceptor and its neighbors (which can be assessed by comparison with existing compounds) and the atomic size match between the acceptor and the host atom for which it substitutes. None of the candidates (Li, Na, K, Be, Zn, and Ca) exhibits characteristics which surpass those of Mg in all respects. Only Be emerges as a potential alternative dopant, although it may suffer from compensation by Be interstitial donors.