Answer:
Explanation:
From the formula;
- R = universal gas constant,
When T = 923 K and D = 5.5 x 10-16 m2/s
923 x R = Qd / [lnDo - ln(5.5 x 10-16 m2/s)] ----- (1)
When T = 1173 K and D = 1.3 x 10-13 m2/s
Plugging the values ; and dividing equation 1 by 2
1173 x R = Qd / [lnDo - ln(1.3 x 10-13 m2/s)] ----- (2)
- By dividing equation(1) and (2) we get
- 923 / 1173 = [lnDo - ln(5.5 x 10-16 m2/s)] / [lnDo - ln(1.3 x 10-13 m2/s)]
- Putting the value of Do in equation (1) we get
- 923 x 8.314 JK-1mol-1 = Qd / [ln(7.54x10-5 m2/s) - ln(5.5 x 10-16 m2/s)]
- Qd = (923 x 8.314 JK-1mol-1) x [ln(7.54x10-5 m2/s) - ln(5.5 x 10-16 m2/s)] = 196783.83 J/atom
b) T = 875°C = 875+273 = 1148K
Hence 1148 x 8.314 JK-1mol-1 = 196783.83 J / [ln(7.54x10-5 m2/s) - lnD]
D = 8.38x10-14 m2/s
The statement is true. gpe= m x g x h
Answer:
A. Direction
Explanation:
Velocity is the speed of something heading in a certain direction. If speed or direction changes, the velocity changes.
Answer:
the extension would be less the new extension might be 3 cm
Explanation:
Answer:
1.body composition, (2) flexibility, (3) muscular strength, (4) muscular endurance, and (5) cardio respiratory endurance.
Explanation: