Answer:
135 hour
Explanation:
It is given that a carburizing heat treatment of 15 hour will raise the carbon concentration by 0.35 wt% at a point of 2 mm from the surface.
We have to find the time necessary to achieve the same concentration at a 6 mm position.
we know that 
where x is distance and t is time .As the temperature is constant so D will be also constant
So 
then 
we have given 
and we have to find 
putting all these value in equation
so 
Answer:
True
Explanation:
To summarise, waves carry energy. The amount of energy they carry is related to their frequency and their amplitude. The higher the frequency, the more energy, and the higher the amplitude, the more energy.
Answer:
HUMAN DEVELOPMENT
MOTOR BEHAVIOR
EXERCISE SCIENCE
MEASUREMENT AND EVALUATION
HISTORY AND PHILOSOPHY
UNIQUE ATTRIBUTES OF LEARNERS
CURRICULUM THEORY AND DEVELOPMENT
Explanation:
