hafsazunair hafsazunair

03-12-2020
Chemistry

contestada

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

Respuesta :

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

If a platform diver has 7350 J of energy when he stands on top of the platform, how much kinetic energy will the diver have when he hits the water? A. OJ B. 367

1. Balance each of the following equations (some are already balanced) To the left of each equation, indicate the reaction type that it represents: C = Combinat

The circle below is centered at the point (2, -1) and has a radius of length 3. What is its equation? 32 O A. (x-2)2 + (y+ 1)2 = O B. (x + 2)2 + (x-1)2 = 32 O C

If m<1= x+ I and m<6= 2x + 2, what must m<5 be so the lines a and b are parallel?

What is the rate of change of the function described in the table? Twelve-fifths 5 25 Over 2 25

Gary and Jill both wanted 23 stickers for a class project. There are 3 sheets of 10 stickers and 30 single stickers on the table. How could Gary and Jill each t

which has more heat energy a pot of boiling water or single Ice Cube

Last year your company earned $2.5 million in profits. Your charitable donations totaled $37,000. This year you expect profits to reach $3 million. If you donat

what is the value of X?

What is the length (magnitude) of the vector (2,-1)?