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Civil Engineering homework help

Why were electrons chosen to be negatively charged?

Why were electrons chosen to be negatively charged? Wouldn’t it make more sense to call electrons positively charged because when they move they make electricity?

Categories
Civil Engineering homework help

Discuss the tests that are currently used to determine whether or not a person has fired or handled a firearm.

Discuss the tests that are currently used to determine whether or not a person has fired or handled a firearm. Are these tests conclusive? Why or why not?
2. Explain in detail how you would collect the following impression evidence located at a crime scene:
a. A shoe print in dry dirt
b. Tool mark on a windowsill
c. Tire marks in soft earth
d. Shoe print on a loose piece of tile
e. Faint shoe print in dust on a colored linoleum floor
need in 8-10 hours est time and 1 reference