1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
liberstina [14]
3 years ago
11

Glass has a hardness that is in the middle of the hardness scale. What is the hardness of Glass?

Physics
2 answers:
sweet [91]3 years ago
8 0

Answer: 5.5

Explanation:

Let's start by explaining that hardness is a property that materials have related to the opposition or resistance they offer to alterations such as penetration, abrasion, scratching, cutting, and permanent deformations, among others.

In this context, several hardness scales have been developed to catalog the materials (specifically minerals), being the Mohs scale  the best known. This scale, proposed by the German geologist Friedrich Mohs in 1825, consists of a ratio of ten minerals numbered in increasing order by hardness, from least to greatest.

This is how the scale starts at 1 with the talc (considered the softest material) and ends at 10 with the diamond as the hardest.

Now, if we are told that the glass is in the middle of the hardness scale that goes from 1 to 10, logically its value will be 5 (volcanic glass). However, according to the scale, the glass is at 5.5.

joja [24]3 years ago
8 0

Answer:

5.5

Explanation:

You might be interested in
Please help me please
shusha [124]

Answer:

A

Explanation:

its A because your comparing so comparative

8 0
3 years ago
Read 2 more answers
Fill in the term that completes the statement. The north and south poles of a magnetic field produced by an electromagnet will s
Minchanka [31]

Answer:

when the direction of the Current changes.

Explanation:

Electromagnet refers to an iron ore wrapped around with a coil of wire, in presence of electric current. As it acts like a magnet, when current is passed through it.

The north & south poles of magnetic fields produced by such magnet, change with direction of current passed through it.

6 0
3 years ago
Read 2 more answers
What is the density of a roll of pennies containing 50 pennies?
ololo11 [35]

Answer:

Density is defined as:

Density = Mass/Volume

Now, density is an intensive property, this means that if you have 10 grams of a given material or 1000 grams of the same material, in both cases you will find the same density.

Then a roll of 50 pennies has the same density that a single penny.

The measures of a single penny are:

Mass = 2.5 g

Thickness = 1.52 mm

Radius = 9.525 mm

The coin is a cylinder, and the volume of a cylinder is:

V = pi*r^2*h

where:

pi = 3.14

r = radius = 9.525mm

h = thikness = 1.52mm

The volume is:

V = 3.14*(9.525mm)^2*1.52mm = 433.015 mm^3

The density will be:

D = 2.5g/433.015mm^3 = 0.00577 g/mm^3

4 0
3 years ago
Which of the following is equivalent to Planks constant
Alinara [238K]

Answer:

6.62607004 x 10^(-34)m²kg/s

Explanation:

This is the constant that shows the value of energy of a photon in relation to it's frequency.

Please let me know if you want this explained further!

Thanks!

8 0
3 years ago
The collision between a hammer and a nail can be considered to be approximately elastic. Estimate the kinetic energy acquired by
AlekseyPX
Hdbdndsnwkwowpprototkgncncncnf
3 0
3 years ago
Other questions:
  • How many cubs can a panda have at once and how long does it take for a mother panda to give birth?
    15·2 answers
  • What is a central idea
    11·1 answer
  • the velocity of a car traveling in the positive direction decreases from 32 m/s to 24 m/s in 4 seconds. what is the average acce
    11·1 answer
  • A 1kg block of ice at 0o C falls into alake whose
    9·1 answer
  • What is a star called that dies peacefully​
    11·2 answers
  • Which statement describes the distribution of charge in an atom? (1) A positively charged nucleus is surrounded by one or more n
    11·2 answers
  • Sally is riding her skateboard at 12.0 ft/s and passes under an apple tree. As she
    11·1 answer
  • ¿Qué nombre recibe un electrón que abandona el espacio interno del átomo dirigiéndose al exterior del átomo?
    6·1 answer
  • How can you increase the momentum of an object
    13·1 answer
  • Clarify this statement acceleration due to gravity of the Earth is 9.8m/s square​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!