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Sonja [21]
3 years ago
15

Diamond is the one mineral in the world that cannot be scratched by any other mineral. Therefore, we refer to diamond as the ___

_________ mineral.
A. hardest
B. purest
C. densest
D. lustrous

A,B,C,D pick a answer
Physics
2 answers:
Shalnov [3]3 years ago
5 0

Answer:

A. hardest

Explanation:

mart [117]3 years ago
4 0

Answer:

hardest

Explanation:

Diamonds are known as the hardest naturally occurring substance known.

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3.2 Define conservation of energy.<br>​
Free_Kalibri [48]

Answer:

A principle stating that energy cannot be created or destroyed, but can be altered from one form to another.

Explanation:

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2 years ago
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Write an original definition for periodic
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a blackbody is radiating with a characteristic wavelength of 9 microns what is the blackbody temperature answer in kelvin
Daniel [21]

This question involves the concepts of Wein's displacement law and characteristic wavelength.

The blackbody temperature will be "3.22 x 10⁵ k".

<h3>WEIN'S DISPLACEMENT LAW</h3>

According to Wein's displacement law,

\lambda_{max} T = c\\\\T=\frac{c}{\lambda_{max}}

where,

  • \lambda_{max} = characteristic wavelength = 9 μm = 9 x 10⁻⁹ m
  • T = temperature = ?
  • c = Wein's displacment constant = 2.897 x 10⁻³ m.k

Therefore,

T=\frac{2.897\ x\ 10^{-3}\ m.k}{9\ x\ 10^{-9}\ m}

T = 3.22 x 10⁵ k

Learn more about characteristic wavelength here:

brainly.com/question/14650107

7 0
3 years ago
A bus took 8 hours to travel 639 km. For the first 5 hours, it
vladimir1956 [14]

Answer:

93 km/h

Explanation:

Given that a bus took 8 hours to travel 639 km. For the first 5 hours, it travelled at an average speed of 72 km/h

Let the first 5 hours journey distance = F

From the formula of speed,

Speed = distance/time

Substitute speed and time

72 = F/5

F = 72 × 5 = 360 km

The remaining distance will be:

639 - 360 = 279km

The remaining time will be:

8 - 5 = 3 hours

Speed = 279/3

Speed = 93 km/h

Therefore, the average speed for the remaining time of the journey is equal to 93 km/h

8 0
3 years ago
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