When we say toolmark, this describes as the mark that is produced by a particular tool. This is typically used in forensic science for identification. Based on the examples above, the one that is not the proper use of casting of a toolmark is option B. Hope this helps.
Answer:
Change in potential energy = 7350 Joules
Explanation:
It is given that,
Side of cube, a = 0.5 m
Density of cube, ![d=2\times 10^3\ kg/m^3](https://tex.z-dn.net/?f=d%3D2%5Ctimes%2010%5E3%5C%20kg%2Fm%5E3)
The cube is lifted vertically by a crane to a height of 3 m
We know that, density ![d=\dfrac{m}{V}](https://tex.z-dn.net/?f=d%3D%5Cdfrac%7Bm%7D%7BV%7D)
So, m = d × V (V = volume of cube = a³)
![m=2\times 10^3\ kg/m^3\times (0.5\ m)^3](https://tex.z-dn.net/?f=m%3D2%5Ctimes%2010%5E3%5C%20kg%2Fm%5E3%5Ctimes%20%280.5%5C%20m%29%5E3)
m = 250 kg
We have to find the change in potential energy of the cube. At ground level, the potential energy is equal to 0.
Potential energy at height h is given by :
![PE=mgh](https://tex.z-dn.net/?f=PE%3Dmgh)
PE = 250 kg × 9.8 m/s² ×3 m
PE = 7350 Joules
So, change in potential energy of the cube is 7350 Joules.
B - A theory seems to be the closest
True.
I think that’s the answer.
Here is my step-by-step-work. Let me know if you have any questions! :)