Well, if you were going to do an experiment without a question (or a well-defined one), you would just be doing one to 'see what happens.' Well, one of two things will occur: Something will happen, or nothing will happen. In either of these cases, if you don't have an original question of why you are doing the experiment, you don't know what you're looking for. Nothing may happen, but how will you know if you weren't really looking for anything to happen. Something may happen, and you may not notice it as you weren't sure what you were looking for. Also, something may happen and you may notice it, but you won't know why it did what it did, or have a theory as to how it could have happened because you didn't try to see if anything specific happened in the first place.
If you're test isn't controlled - or doesn't have a question or hypothesis - then it is basically just an accident. Whatever happens happens, but you aren't doing anything to make anything specific happen.
I don't know what an Odyssey Writer is, but I hope this helps!<span />
The speed of the wave in water is 833.33 m/s
The given parameters;
- depth of the wrecked ship, d = 1000 m
- frequency of the wave transmitted, f = 50 kHz
- time of motion of the echo, t = 2.4 s
The speed of the wave in water is calculated by applying echo equation as shown below;
![2d = velocity \times time\\\\velocity = \frac{2d}{time} \\\\velocity = \frac{2\times 1000 \ m}{2.4} \\\\velocity = 833.33 \ m/s](https://tex.z-dn.net/?f=2d%20%3D%20velocity%20%5Ctimes%20time%5C%5C%5C%5Cvelocity%20%3D%20%5Cfrac%7B2d%7D%7Btime%7D%20%5C%5C%5C%5Cvelocity%20%3D%20%20%5Cfrac%7B2%5Ctimes%201000%20%5C%20m%7D%7B2.4%7D%20%5C%5C%5C%5Cvelocity%20%3D%20833.33%20%5C%20m%2Fs)
Thus, the speed of the wave in water is 833.33 m/s
Learn more here: brainly.com/question/23433611
Sodium sulfide formula is Na₂S.
Na is a group 1 element, it has one valence electron therefore it is ready to give that valence electron and form an ionic bond. Once it gives out the electron it becomes a positive ion - Na⁺
sulfur is a group 6 element, has 6 electrons its outer shell and needs to gain 2 more electrons to become stable. Once it gains 2 electrons it becomes a negative ion - S²⁻.
Since Na only gives out 1 electron, S²⁻ ion needs to take in 2 electrons, therefore forms an ionic compound with 2 Na⁺ ions.
decomposition of Na₂S is as follows;
Na₂S(s) --> 2Na⁺(aq) + S²⁻ (aq)
Weight = (mass) x (gravity)
Divide each side by (gravity): Mass = (weight) / (gravity) =
(55.54 N) / (9.83 m/s²) =
5.65 kilograms