Answer:
11.32cm
Explanation:
This question describes a cylinder rod formed from silicon with length 21.3cm and mass 5kg. The density of the silicon is 2.33g/cm3.
To calculate the diameter, the radius is needed. To calculate the radius, the volume is needed. To calculate the volume, the formula: density = mass (m) / volume (V) is used.
Mass = 5kg, which is 5 kg × 1000g = 5000g
Density= 2.33g/cm3
Hence; volume= mass / density
= 5000/2.33
= 2145.9 cm3
Volume of cylinder= πr^2h
Where h= 21.3cm and π= 3.142
That is; r^2 = volume/πh
= r^2 = 2145.9/3.142×21.3
= r^2 = 2145.9/66.9246
= r^2 = 32.06
r= √32.06
r= 5.66cm
If radius of the cylinder is 5.66cm, the diameter is twice of the radius.
That is, diameter (d) = 5.66 × 2
= 11.32 cm
Therefore, the diameter of the cylinder is 11.32cm.
The physical science unit of criminal investigation applies principles and techniques of chemistry, physics, and geology to the identification and comparison of crime scene evidence.
<h3>What is forensics in criminal investigation?</h3>
Forensics science is any of several fields of study involving the collection of physical evidence and its subsequent analysis.
The aim is to use of science and technology in the investigation and establishment of facts or evidence in a court of law.
There are several units involved in forensics science such as the following;
- Biology unit
- Physical science unit
The physical unit of forensics is the unit that applies principles & techniques on chemistry, physics and geology, which are physical science fields, to identify and compare crime scene evidence.
Learn more about forensics at: brainly.com/question/14403044
#SPJ1
