Answer:
Gravity
because the earth which pulls any object towards it center and the velocity is achieved
Mechanical energy = mass x acceleration due to gravity x height
= 1x9.8x10 = 98J
It’s the 3rd one obviously bro
Answer:
What is spectrophotometry? It is an analytic method that it use substances light absorbance property
How can this be useful in identifying drugs? It possible compare spectra and identify problem substance
Explanation:
The way substances absorb light is unique and because of that it is possible to use spectrophotometry for substances identifying. the model spectra are measured in ideal conditions, so, it is difficult ensure the same conditions and to achieve identical spectra.
I hope I have been helpful
1) D. An element
2) D. Suspension
3) A. Iodine
4) A. Atoms of the same element
