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3 years ago

What reason best explains why metals are shiny

2 answers:

8 0

Metals are shiny because of their electrons. These electrons produce light when they come in contact with light. I hope this helps.

Elanso [62]3 years ago

4 0

The shiny appearance of a metal is most closely related to the metal's highly mobile valence electrons. In metallic bonds, the mobile electrons surrounding the positive ions are called a(n) electron sea. As light strikes the surface of a metal, the electrons in the electron sea absorb and re-emit the light.
I hope this helps.

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Determine the formula weight of caffeine, C₈H₁₀N₄O₂. Provide an answer to two decimal places.

arlik [135]

Let's find

$\\ \tt\hookrightarrow C_8H_10N_4O_2$

We need accurate mass

$\\ \tt\hookrightarrow 8(12.011)+10(1.007)+4(14.006)+2(16.0)$

$\\ \tt\hookrightarrow 96.088+10.07+56.024+32.0$

$\\ \tt\hookrightarrow 196.182g/mol$

$\\ \tt\hookrightarrow 196.18g/mol\:or 196.18u$

5 0

2 years ago

Read 2 more answers

List three different forms of potential energy

Wewaii [24]

Answer:

Types of Potential Energy

Elastic Potential Energy. Anything that can act like a spring or a rubber band can have elastic potential energy. ...

Gravitational Potential Energy. There is a constant attractive force between the Earth and everything surrounding it, due to gravity. ...

Chemical Potential Energy.

(IF THIS HELPED CAN YOU GIVE ME A BRAINYLEST PLEASE?)

3 0

3 years ago

How are the molecules moving in a cold glass of water compared to in a warm glass of water

taurus [48]

Molecules move faster in a warm glass of water they move slower in a cold glass of water

4 0

3 years ago

A marble rolls off horizontally from the edge of table top 1.50 m above the floor. it strikes the floor 2.0 m from the base of t

GrogVix [38]

a. t=0.553 s

b. vox(horizontal speed) = 3.62 m/s

<h3>Further explanation</h3>

Given

h = 1.5 m

x = 2 m

Required

a. time

b. vo=initial speed

Solution

Free fall motion

a. h = 1/2 gt²(vertical motion=h=voyt+1/2gt²⇒voy = 0)

$\tt t=\sqrt{\dfrac{2h}{g} }$

t = √2h/g

t = √2.1.5/9.8

t=0.553 s

b. x=vox.t(horizontal motion)

$\tt x=v_{ox}\times t$

vox=x/t

vox=2/0.553

vox=3.62 m/s

3 0

2 years ago

In order to change a solid to a liquid or a liquid to a gas, what is needed?

AfilCa [17]

Latent heat, also called the heat of vaporization, is the amount of energy necessary to change a liquid to a vapour at constant temperature and pressure. The energy required to melt a solid to a liquid is called the heat of fusion

6 0

3 years ago