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

What is one hundred minus negative two hundred fifty?

A rectangle has an area of 102 cm ^2. The length of the rectangle is 17 cm. Which is the perimeter of the rectangle? Enter your ans

the number 0.1111... repeats forever; therefore, it is irrational.

Mark the statement which is NOT TRUE. A standing army is a group of soldiers ready to do battle. King John of England ruled England in the 1200's but was a va

what is the radius of a circle with a circumference measuring 24π cm

9\10 times a number plus 6 is 51

You have a nightlight plugged into an outlet in the hallway, which uses 3.5 watts when plugged in. If the house circuit provides 120.0 volts, what is the curren

.let f(x) = −4x 7 and g(x) = 10x − 6. find f(g(x)). (1 point)−40x 24 −40x 31 −40x 64 −40x 70

TRUE or FALSE 1. Drinking too much milk is a cause of childhood obesity. 2. One pound of body fat represents about 1500 stored calories. 3. High-density lipopro

Which of the following will sink in a container of mercury with a density of 13.6 g/mL? A. zinc, D = 7.14 g/mL B. ice, D = 0.92 g/mL C. gold, D = 19.3 g/mL