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3 years ago

Which statement describes a chemical property related to the particles that make up the material

1 answer:

7 0

Answer: The correct answer would be C. Salt crystals are hard and brittle because they are made up of atoms that combine by ionic bonding.

Explanation: All the other ones are chemical changes because a new substance is formed.

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When is the angular momentum of a system constant?

Artist 52 [7]

I think it’s a but I’m not 100% sure

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3 years ago

Which color light has the highest frequency?

saw5 [17]

It's gotta be purple!!!!!!!!!!!!!!!

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3 years ago

What is the minimum size copper equipment grounding conductor required to serve a multi section motor control center equipped wi

Yakvenalex [24]

The minimum size copper equipment grounding conductor that is required is ; #4 copper

<h3>Equipment grounding conductor </h3>

An Equipment grounding conductor is a conductive part of ground fault current path which connects the non-conducting metallic parts of the euipment together and also connects the system grounded conductor.

For a copper euipment grounding conductor required to serve a control center connected to a 300 amp over current device the minimum size of copper is #4 copper

Hence we can conclude that The minimum size copper equipment grounding conductor that is required is ; #4 copper.

Learn more about Equipment grounding conductor : brainly.com/question/14124204

4 0

2 years ago

In the first stage of a two-stage rocket, the rocket is fired from the launch pad starting from rest but with a constant acceler

AnnZ [28]

Answer:

3091.56

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s² (positive downward and negative upward)

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=0\times 25+\frac{1}{2}\times 3.5\times 25^2\\\Rightarrow s=1093.75\ m$

Distance traveled in the first stage is 1093.75 m

$v=u+at\\\Rightarrow v=0+3.5\times 25\\\Rightarrow v=87.5\ m/s$

Velocity at the end of first stage is 87.5 m/s

$v=u+at\\\Rightarrow a=\frac{v-u}{t}\\\Rightarrow a=\frac{132.5-87.5}{10}\\\Rightarrow a=4.5\ m/s^2$

Acceleration of the second stage is 4.5 m/s²

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=87.5\times 10+\frac{1}{2}\times 4.5\times 10^2\\\Rightarrow s=1100\ m$

Distance traveled in the second stage is 1100 m

$v^2-u^2=2as\\\Rightarrow s=\frac{v^2-u^2}{2a}\\\Rightarrow s=\frac{0^2-132.5^2}{2\times -9.81}\\\Rightarrow s=894.81\ m$

Distance traveled after the second stage has stopped firing is 894.81 m

Total height the rocket reached = 1093.75+1100+897.81 = 3091.56 m

3 0

4 years ago

How does the speed of light in glass depends on the frequency

Naddik [55]

Answer:

Frequency is of light depends upon the body that emits it. While wavelength depends on the medium through which it travels in vacuum the product of wavelength and frequency is the same while in other mediums the light of higher wavelength travels faster besed on refractive index. So light velocity depends on both frequency and wavelength.

Explanation:

6 0

4 years ago