Answer:
for this problem, 2.5 = (5+2/2)-(5-2/2)erf (50×10-6m/2Dt)
It now becomes necessary to compute the diffusion coefficient at 750°C (1023 K) given that D0= 8.5 ×10-5m2/s and Qd= 202,100 J/mol.
we have D= D0exp( -Qd/RT)
=(8.5×105m2/s)exp(-202,100/8.31×1023)
= 4.03 ×10-15m2/s
Answer:
Most living things need oxygen helps organisms grow,reproduce,and turn food into energy.Oxygen gives our cells the ability to break down food in order to get the energy we need to survive.
Answer:
Explanation:
Given
Speed of Primary wave 
Speed of secondary wave 
difference in timing of two waves are 
Suppose both travel a distance of d km then
Subtract (ii) from (i)
![d[\frac{1}{4.5}-\frac{1}{8}]=77.2](https://tex.z-dn.net/?f=d%5B%5Cfrac%7B1%7D%7B4.5%7D-%5Cfrac%7B1%7D%7B8%7D%5D%3D77.2)
![d[0.0972]=77.2](https://tex.z-dn.net/?f=d%5B0.0972%5D%3D77.2)
<u>Answer:</u>
"Where friction or rubbing results in the transfer of electrons between particles, objects can become negatively or positively charged."
<u>Explanation:</u>
The motion resistance of one moving object with respect to another is called as "Friction". It isn't a basic force, like gravity or electromagnetism. Alternatively, scientists believe it is the product of the electromagnetic attraction in two touching surfaces between charged particles.
The friction have formula:
Friction force (<em>f </em>) = coefficient of friction × normal force (N)
For an instances when one ride a bicycle, an example of rolling friction is the contact between the wheel and the way.
In a series circuit, there is only one path for current to take.
If more bulbs are added, then the same current loses more energy,
making heat and light on its way through more bulbs, so the ones that
were there before become dimmer.
