Answer:
The temperature is 2584.5 K
Explanation:
Given:
Activation energy
Preexponential
Diffusion flux
Thickness of plate m
Concentration of carbon at two faces
From the formula of temperature in terms of diffusion flux,
Where 8.314 ( gas constant )
Put the values and find the temperature,
K
Therefore, the temperature is 2584.5 K
Answer:
The focal length of the given spherical mirror is 20cm.
Explanation:
plz follow me
Not sure but i will say D
There are some missing data in the text of the problem. I've found them online:
a) coefficient of friction dry steel piston - steel cilinder: 0.3
b) coefficient of friction with oil in between the surfaces: 0.03
Solution:
a) The force F applied by the person (300 N) must be at least equal to the frictional force, given by:
where
is the coefficient of friction, while N is the normal force. So we have:
since we know that F=300 N and
, we can find N, the magnitude of the normal force:
b) The problem is identical to that of the first part; however, this time the coefficienct of friction is
due to the presence of the oil. Therefore, we have: