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soldier1979 [14.2K]
3 years ago
7

I need a science fair project that doesn't need anything on the pic and it can be about any subject thanks.

Physics
1 answer:
tigry1 [53]3 years ago
7 0

you could make a self propelled car all you need is cardboard, wheels, and a balloons or rubber bands

  

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If the equation on the board had shown 3 atoms of carbon on the reactants side, how many atoms of carbon would need to be repres
Sholpan [36]

3

Explanation:

If the equation on the board had shown 3 atoms of carbon on the reactants side, it would need 3 atoms of carbon on the product side to balance it.

This is in accordance to the law of conservation of mass which states that "matter is neither created nor destroyed during the course of chemical reaction, they are only transformed from one form to another".

We expect the same number of atoms on both sides of the equation. For example:

                    Fe + S  →   FeS

               1 iron atom combines with 1 sulfur atom to produce FeS which contains 1 iron and sulfur atoms.

Learn more:

Chemical equation brainly.com/question/2924195

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2 years ago
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How many cycles/vibrations are there in 1 wavelength?
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Te question is missing some information. However, I'll try to help you out with the steps.

We have the relation between velocity, wavelength and frequency expressed as follows:
c = λμ
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λ is the wavelength of the wave
μ is the frequency of the wave

Substituting in the above equation, we can get the frequency of the wave which is the number of vibrations per units of time

We can then get the periodic time which is 1/frequency

Hope this helps :)

3 0
3 years ago
A paper weight is dropped from the roof of a block of multi story flats. Each storey being 3 metre high. It passes the ceiling o
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Volume is the space occupied by a quantity of matter. <br> a.true <br> b.false
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7 0
3 years ago
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A car sitting at a red light begins to accelerate at 2.0 m/s2 when the light turns green. It continues with this acceleration un
KonstantinChe [14]

Answer:

d = 820 m

Explanation:

here we know that car starts from rest and continue to accelerate till it will reach to maximum speed of 20 m/s

so we will have

v_f - v_i = at

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t = 10 s

so car will accelerate till t = 10 then it will move with uniform speed

so the distance moved by the car till it accelerates is given as

d = \frac{1}{2}at^2

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now it will move with uniform speed for next 36 s

so we have

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8 0
2 years ago
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