"Edmond Locard" states that there is an exchange of materials when two objects come into contact with each other.
<u>Explanation:</u>
A French criminologist who was popular as the "Sherlock Holmes of France," the pioneer in forensic science named as Dr. Edmond Locard. He articulated forensic science's fundamental principle "Each touch leaves a trace." This became known as Locard's philosophy of exchange. A Locard hypothesized that each and every time you touch another person, place or object, the result would be an exchange of materials. Burglars, for instance, will leave evidence of their existence behind and take traces with them too.
Beat frequency is given by the difference of two frequencies played together

given that


Now


Answer:
The pressure is 
The temperature is 
Explanation:
Generally Gibbs free energy is mathematically represented as

Where E is the enthalpy
PV is the pressure volume energy (i.e PV energy)
S is the entropy
T is the temperature
For stability to occur the Gibbs free energy must be equal to zero
Considering Diamond
So at temperature of T = 300 K

making P the subject

Now substituting 300 K for T , 2900 J for E ,
for V and
for S


The negative sign signifies the direction of the pressure
Given that 
making T the subject

Substituting into the equation


(39 m/s / 917) x 1000 = 42.5m/s