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

A magician asks two volunteers to each draw a card from a standard deck of cards. What is the probability that the first card is a heart and the second card is

Rearrange the equation below to solve for y. 6x+6y= 24

According to the rivet model of community structure, A) species share a community because of similar abiotic requirements. B) communities generally lack sharp g

write an inequality, use n as a variable, and then solve the inequality. an auto mechanic estimates that the cost to repair Brett’s car will be no more than $20

Can somebody pls tell me which statement is true ?

The work of a student to find the dimensions of a rectangle of area 8 + 12x and width 4 is shown below: Step 1: 8 + 12x Step 2: 4(2) 4x2) Step 3: 4(4 + 8x) Step

Identify an equation in slope-intercept form for thr line parallel to y=5x+2 that passes through (-6, -1).

Ruby is 25 and has a good job at a biotechnology company. She currently has $9,200 in an IRA. She believes her IRA will grow at an annual rate of 7 percent, and

mrs. Campbell the owner pays $2,600 to advertising in the current edition of a local newspaper

What are the solutions to the system of equations? x = x^2 - 4x +3 y = -x +3