hafsazunair hafsazunair
  • 03-12-2020
  • Chemistry
contestada

can copper be scratched by a fingernail or blade knife. why?

Respuesta :

M7mdnja
M7mdnja M7mdnja
  • 03-12-2020

Answer:

it could by blade knife

Explanation:

fingernail has hardness 2.5; copper penny, about 3.5; a knife blade, 5.5

Answer Link

Otras preguntas

Why is commercial fishing a more important industry in Canada than its employment numbers would suggest it should be?
A line has a slope of -5/2 and includes the points (r, -1) and (4, -6). What is the value of r? r=
Explain the metamorphosis process in 10 words or less.
At this moment I am in the quinceañera of the Alonso family. I have 15 more celebrations this month. I'm busy. Select the degree adverb that correctly completes
In figure find the area of the red part.​
If y² = u² + 2ad, then d = ?​
in a triangle PQR, right angled at Q, PQ=20cm, QR=15cm. find the PR
The characteristics listed in the table describe which of the following? Question 5 options: Patriot Loyalist Federalist Anti-Federalist
in which parts of the ear are the vibrations occurring in a solid, liquid, and gas
Pls I need your helppppp