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jolli1 [7]
4 years ago
10

If a satellite or spaceship explodes in outer space, you can see the explosion from a distance but you cannot hear it. Why?

Chemistry
2 answers:
gulaghasi [49]4 years ago
7 0
C) Sound is a mechanical wave and needs a medium to travel through while light is an electromagnetic wave
Lynna [10]4 years ago
5 0
The answer is:
   C) Sound is a mechanical wave and needs a medium to travel through while light is an electromagnetic wave.
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An inclined surface with one or two sloping sides forms a machine called a?
Nady [450]
The answer is wedge to your answer


5 0
4 years ago
Complete these metric conversions: 53 m - mm*
EleoNora [17]

Answer:

53 meters = 53000 millimeters

Explanation:

In this question we have to convert meters into millimeters .

By metric conversion,

Since, 1 meter = 1000 mm

Therefore, 53 meters = 53 × 1000

                                  = 53000 millimeters

53 meters = 53000 millimeters is the answer.

3 0
3 years ago
How is 0.00069 written in scientific notation?
vfiekz [6]
6.9 x 10^-4 would be .00069 written in scientific notation
4 0
3 years ago
Read 2 more answers
Which reaction has the highest atom economy for the production of C02?​
In-s [12.5K]

The highest atom economy

2CO + O₂ ⇒ 2CO₂

<h3>Further explanation</h3>

Given

The reaction for the production of CO₂

Required

The highest atom economy

Solution

In reactions, there are sometimes unwanted products that can be said to be a by-product or a waste product. Meanwhile, the desired product can be said to be a useful product, which can be shown as the atom economy

of the reaction

the higher the atomic economy value of a reaction, the smaller the waste/ byproducts produced, so that less energy is wasted

The general formula:

Atom economy = (mass of useful product : mass of all reactants/products) x 100

<em>or </em>

Atom economy = (total formula masses of useful product : total formula masses of all reactants/products) x 100

So a reaction that only produces one product will have the highest atomic value, namely the reaction in option C

4 0
3 years ago
The _______ energy from the _______ arrives in the form of visible and invisible light. A. Earth's, Sun B. Moon's, Earth C. Sun'
wlad13 [49]
The correct answer is C the suns energy from the earth
3 0
3 years ago
Read 2 more answers
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