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Temka [501]
3 years ago
5

Jennifer is making a collage using her favorite photos. She wants to cover the collage with something that allows her to see the

photos, but also protects them from dust. Which material should Jennifer use?
a material that absorbs light
a transparent material
an opaque material
a material that reflects light
Physics
2 answers:
Neko [114]3 years ago
7 0

Answer: a transparent material

Explanation:

Materials that do not transmit light are known as opaque objects. These objects absorb all the light.

Transparent material transmit all the light. Thus, we can see through the transparent material. So, Jennifer must cover the collage with a transparent material that allows her to see photos thereby protecting them from dust.

Karolina [17]3 years ago
4 0
B.) A transparent material
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Answer:

4.14 m

Explanation:

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Let in this last leg , u be the initial velocity.

s = ut + 1/2 g t²

2 = .2 u + .5 x 9.8 x .04

u = 9.02 m /s .

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= 81.36 +39.2

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Now consider the whole height from where the ball dropped . Let it be h.

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5 0
3 years ago
A 3.53-g sample of aluminum completely reacts with oxygen to form 6.67 g of aluminum oxide. find percent composition
katrin2010 [14]

The mass percent composition of aluminum is 52.9% in aluminum oxide.

Mass of the aluminum = 3.53 g

Mass of the aluminum oxide = 6.67 g.

The mass percent of a substance is the mass of the substance divided by the mass of the compound into 100.

Aluminum reacts with oxygen to form aluminum oxide.

The overall balanced equation for the reaction is,

Aluminum + Oxygen→Aluminum \: oxygen

4Al +3O _{2}→2Al _{2}O _{3}

The mass percent composition of aluminum in the aluminum oxide is,

Mass  \: percent = \frac{ Mass \:  of \:  the  \: substance}{ Mass  \: of \:  the \:  compound} \times 100

Mass  \: percent =  \frac{Mass  \: of \:  the  \: aluminum}{ Mass \:  of \:  the \:  aluminum \: oxide } \times 100

Mass \:  percent  =  \frac{3.53}{6.67 } \times 100

= 52.9 %

Therefore, the mass percent composition of aluminum is 52.9% in aluminum oxide.

To know more about aluminum oxide, refer to the below link:

brainly.com/question/25869623

#SPJ4

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