Could Embedding Element 119 in a Negative Charge ... - Physics …
Oct 28, 2014 · In summary, the conversation discussed the possibility of using electron screening to modify the alpha-decay lifetime of elements, specifically element 119. However, after some research, it was found that this method would not be effective due to the cancellation of effects on the alpha particle energy and coulomb barrier height.
Why Elements 119+ May Not Exist - Physics Forums
Aug 17, 2014 · FAQ: Why Elements 119+ May Not Exist Why are elements 119 and above not found in nature? Natural elements are created by the fusion of smaller atoms in stars, but the conditions required for creating elements 119 and above are extremely rare and difficult to recreate. Can elements 119+ be created in a lab?
Solving the Resistance of an Electric Water Heater - Physics Forums
Apr 1, 2009 · In summary, the problem involves finding the resistance of a heating element in an electric water heater that warms 137 kg of water from 20°C to 45.0°C in 16.0 min, with a 220-V potential difference. The equation R=V/I can be used to solve for the resistance, and the power can be calculated using the equation P=V^2/R.
How Does a Resistor Affect the Heating Time of Water? - Physics …
Oct 1, 2020 · Find the resistance (in Ω) of its heating element, which is connected across a 240 V potential difference. How much additional time (in min) would it take the heater to raise the temperature of the water from 45.0°C to 100°C? What would be the total amount of time (in min) required to evaporate all of the water in the heater starting from 20 ...
What is the difference between writing f and f(x)? - Physics Forums
Nov 29, 2020 · To make it one, we need the notation ##f(x)## which is why it is used. ##f## alone is just an element of a subset of a cartesian product of two sets, and nothing else can be concluded from it. Only the word function carries information in that case.
4D angular coordinate system and corresponding hypervolume …
Mar 4, 2009 · In a 4D angular coordinate system, the hypervolume element is calculated by multiplying the infinitesimal changes in each of the four coordinates (dx, dy, dz, and dt). This can be represented mathematically as dV = dx * dy * dz * dt. The resulting hypervolume element is a four-dimensional measure of the volume in space and time.
Do you believe that continuum is Aleph-2, not Aleph-1? - Physics …
Sep 15, 2016 · A cofinal subset X of an ordinal k is a subset such that for every element y ∈ k, there is an element x ∈ X such that y ≤ x.) This observation, derived from Koenig's Theorem, implies for instance that it must be the case that c ≠ aleph (aleph 0).
Why Does All Matter in the Universe Want to Become Iron?
Jul 9, 2004 · 119 Not sure exactly what was meant to buy those statements, but I can tell you that the fusion of elements lighter than iron yields energy, and can therefore be self-sustaining. Once fusion within a collapsing star begins fusing smaller elements into iron, no energy surplus results, there is no energy "profit" to this process, and so it cannot ...
How is the 4-Dimensional Element Volume Used in ... - Physics …
Nov 15, 2019 · In summary: In this case, the volume element is ##\sqrt{-GM} d^3 x##, where ##M## is the mass of the object.In summary, the 4-volume element is used in GR to get the action, and in quantum electrodynamics and quantum chromodynamics it is used to get more global quantities like the total energy, momentum, and angular momentum of a dynamical …
Element of surface area in spherical coordinates - Physics Forums
Dec 8, 2019 · So my conclusion is that an area element (for an arbitrary body with symmetry with respect to ##\phi## which leads to the ##2\pi## factor) should be ##2\pi r d\theta dr ##. On comparison with the area element in the problem statement, this leads me to the conclusion that ##d\theta dr = sinθ \sqrt{dr^2+r^2 dθ^2}## which I cannot reconcile and ...