Why is it that newer organic matter has more carbon-14 than older organic matter?
Isn't carbon constantly recycled, because of the carbon cycle? So C14-depleted carbon from old matter would enter the atmosphere, then be breathed in by new organic matter. The new matter would start off with...
When you heat things up, they emit specific wavelengths of light, right? Like when you heat up sodium, it emits yellow.
But don't things emit shorter wavelengths of light at higher temperatures? Like how hotter stars are blue and colder stars are yellow. Since stars are mostly hydrogen...
Let's say an object is falling towards Earth from a long distance away. As it gets closer and closer, the acceleration would increase, inversely proportional to the distance squared.
Is there any way I can graph this on an acceleration/time graph, or a distance/time graph?
The challenge is...
Okay so we did this experiment in school, and we dropped a steel ball into glycerin. After entering the water, it slowly sank at a constant speed, so that's how I know that the drag and buoyancy are equal to the weight.
Does drag increase with speed? Is it directly proportional or something...
When a dense object sinks in water, it sinks at a constant rate, because the buoyancy and fluid drag counteract the weight of the object.
But if there is no resultant force, then why does the object slow down when it enters the water? Eg. if it's traveling at 2 m/s when it enters the water...
Okay thanks.
Also, in a weak acid, with the value of Ka, is it possible to find Kb? Can the Kw be used to do this for all acids?
Eg. if my value of Ka is 10^-4, is Kb always going to be 10^-10? For every single acid?
And if the H+ concentration is 10^-4, then is the base concentration always...
Okay so concentration is different from whether an acid is strong or weak?
Meaning if you have a diluted acid, then you use Kw, but if you have a concentrated acid, whether it's strong or weak, you have to use Ka to calculate the pH?
So I've learned that in strong acids that dissociate completely, the concentration of H+ is the same as the concentration of the initial solution. So 1M of a strong acid will create 1M of H+, meaning the pH is 0.
I've also learned that in weak acids, the whole thing doesn't dissociate. I have...
Does that mean the primary field loses energy over time?
Does the same apply for when an electromagnetic field attracts iron objects?
Is it the size of the field that diminishes, or the attracting energy itself?
Thanks for all your help.
In mutual induction, when a coil is turned on or off, it generates voltage in another nearby coil. But where is that voltage coming from? It can't be created, so what form of energy does it convert from?
As far as I know, when the magnetic field cuts across the coil, that generates voltage...
Correct me if I'm wrong, but based on what I've learnt, there are three kinds of waves: mechanical, transverse progressive and longitudinal progressive.
Mechanical - A disturbance makes particles vibrate on the spot
Transverse progressive - Energy is carried, and moves perpendicular to the...
When a third source of gravity is added and calculated for, the whole system's motions become really complicated. Usually, a computer is used to make such calculations. But sometimes, if the third object is really tiny or far away, it can be ignored, and the trajectories can still be reliably...