Karthikeyan KC

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Viewing 15 replies - 1 through 15 (of 84 total)
  •   What is your opinion on feminism? #9481

    As a human, everyone deserves their rights. But looking back at the history and the current scenario, the women were oppressed and had to struggle hard to get that right — even today! So if feminism is all about ensuring women’s rights back and empowering them, it’s not just good and healthy, but necessary. And I prefer the term equality!

    But unfortunately there are people who call themselves feminists, but all they do is blame patriarchy that doesn’t exist anymore and victimize themselves for every challenge they face in life. These bad eggs … I believe they root out from a very misinformed end of the modern feminism spectrum.

    And welcome to Geekswipe @yomdc! :)

  •   Easiest way to transfer files from PC to Android using Wi-Fi without internet #7536

    You can do that with FTP or SMB. You’ll need to set up an FTP server or enable file sharing on your computer to the folders you would like to share. And then you can access it from your Android with any FTP/SMB clients available from the app store. I’ve used AndSMB client and it does the job! Here is an updated overview on this.

  •   Weight of Baking Soda & Vinegar goes down when mixed, even when gas is captured #7513

    Hello Durran,

    Interesting question.

    The short answer for this is buoyancy.

    Long answer:

    When the flask and the balloon setup is placed, it is inside a fluid (air) medium. And as it occupies a certain volume, the setup would experience a buoyant force. (If the density of the whole setup is less (hypothetically) than that of the air, it will float way, of course. But in reality, the density is high, and so it sinks.) Now when the baking soda and vinegar in the flask reacts, the gas inflates the balloon. This increases the volume of the whole system, which makes it less dense compared to the previous state. As the density decreases, the buoyant force on it increases a bit, making it to weigh lighter than before.

    The law of conservation of mass is not violated here as the total mass remains the same, while the weight (mass × acceleration due to gravity) of the system is the one that changes.

    Hope it helps! :)

  •   What are some good online multiplayer games that are not pay to win? #7339

    Most games—the majority of free MMO games—are pay 2 win sadly. From the top of my mind, DOTA 2 is currently a free, play 2 win MMO that I played some time ago. You only need to pay for the cosmetic stuff. But then there is DOTA plus. But honestly, even the paid games are turning into pay 2 win these days with all that shortcut kits and other loot box craps. It’s a sad state of gaming today. So to answer your question, there are no online games these days that would qualify as a truly skill based play to win!

  •   Could a rocket flying below escape velocity leave Earth’s gravitational field? #7283

    You’re right. A rocket with enough fuel in it would eventually leave the Earth’s gravitational field, even if the velocity is less than the escape velocity. This is because the rocket’s engine is propelling it constantly with enough thrust to counter the effects of the gravitational pull.

    In the other hand, escape velocity is the initial minimum speed threshold required for an object thrown or launched upwards from the surface of the Earth so that the projectile would leave the gravitational field without the need for any propulsion or work. So if you were to launch a rocket at 11.2 km/s, it can theoretically leave the gravitational field of the Earth without any further thrust from the engine. The concept of escape velocity usually applies to projectiles (objects that are not powered).

  •   Chemical elements that would bond with Na+ or Cl- in a water medium #7280

    Hello Javy,

    Welcome to Geekswipe Curiosity. When NaCl dissolves in water to form Na+ and Cl, depending on the ions that are already in the water medium, there would be a lot of possibilities for the two ions to bond with other counterions to become neutral again. At room temperature and pressure, most of such reactions would be soluble in water for Na+ and Cl. However, Lead ion and chloride ion for example, would result in a partially soluble precipitate of lead chloride. And silver ion with chloride ion would result in an insoluble precipitate. You can refer this solubility chart for all possible reactions.

  •   Where do electrons come from in the light-dependent reactions? #6803

    When light is incident on the photosystem II, the electrons in the chloroplast molecules are excited. And when this energy is transferred to the reaction centre (via resonant energy), the electron acceptors remove the excited electron from the (special pair) chlorophyll and initiates the electron transport chain process.

    Also, due to photolysis, the water molecules are split into O2 atoms and H2+ ions. The electrons lost by the chlorophyll pigments in the photosystem II is replaced by these electrons lost (by the H2 atoms) in the splitting of the water. The H2+ ions then form the hydrogen ion gradient coupled with the electron chain, whereas the O2 atoms combine to form oxygen molecule that is released as a by-product.

    Further down the electron transfer chain, the electrons from photosystem II reaches photosystem I and is accepted by the already electron deficit chlorophyll molecules (The photosystem I would also lose electrons the same was like photosystem II) in the reaction centre of photosystem I. The lost electrons from photosystem I will go into making NADPH, further leading to create ATP.

    So to answer your question, the electrons come from a) excitation of electrons in the photosystem II reaction centre, b) splitting of water molecules due to photolysis, c) excitation of electrons in the photosystem I reaction centre.

  •   Why melting icebergs displace more water? #6705

    Hi Jamie. The sea level mainly raises due to ice from land getting mixed up in the sea. For example, at Antarctica, the ice sheets are a part of the land mass and not the sea. Due to global warming, this ice sheets break off and run into the ocean, thereby displacing water equal to its mass (Archimedes principle). This is what causes the ocean levels to raise primarily.

    Now let’s take a look at the icebergs that are already in the ocean. When these icebergs melt they shouldn’t displace any more of the water they had already displaced. This is only true when the water from the ice has the same concentration as of the sea water.

    But if the icebergs are made up of fresh water, a different process happens. The sea water is a little denser when compared to the fresh water. So when the fresh water mixes up in the ocean, it takes a little more volume than its frozen form, thus raising the ocean levels slightly.

  •   Find ratio of water of different temperatures to attain a specific temperature #6157

    Hi Mark,

    When you have water at two different temperatures and mix them the heat would flow from higher temperature (hot water) to the lower temperature. So the basic equation here is, heat lost by hot water = heat gained by cold water as both reach a thermal equilibrium.

    Heat transfer Q = mcΔT.

    Where m is the mass of the water, c is the specific heat (4.1855 J/g°C) and ΔT is the change in temperature.

    For your case, X litres at 5 degrees C and Y litres at 10 degrees C,

    Cold 5——x——10 Hot

    (X 103)(4.186)(10 – x) = (Y 103)(4.186)(x – 5)

    Solving this, we get

    X/Y = x – 5 / 10 – x

    Now for your other cases, where you need to find the ratio of hot and cold water to mix and attain a specific temperature (x), all you need to do is substitute the equilibrium temperature value for x. X/Y is the ratio of the water you need to mix.

  •   [Ask a Geek] What if you pressed something indefinitely? #6142

    Hi Johnnie,

    This is an interesting question! :)

    When you press something indefinitely with the help indestructible stuff, you will eventually start the process of creating a singularity a.k.a the black hole. So to begin with, let’s consider you are compressing an object like an iron ball for example. When you increase the pressure in the container, the molecules in the ball start compressing and in the process the temperature rises (the molecular kinetic energy increases). The more you compress the more the heat is added (as work done + rise in the average kinetic energy of molecules). This will eventually lead to a change in the phase of the iron ball.

    Take a look at Iron’s phase diagram below.

    Iron's Phase Diagram

    Let’s say you have reached a temperature of 3000 degree Celsius and pressure beyond 500 bar.

    At this point, iron would only exist as a hot molten liquid. When you keep increasing the pressure with the ‘indestructible and non-reactive’ piston of yours, the molecules will soon rip itself apart and soon the electrons will rip itself from the atoms (as they will reach very high energy states), forming a very hot plasma.

    You keep increasing the pressure, you would have added enough energy to overcome the repulsion between the electrons and nucleons (a countering pressure called degeneracy pressure). This is the point where you will cross the electron degeneracy pressure.

    After overcoming that, you will eventually overcome the proton degeneracy pressure. And as the energy of electrons and protons are now increased, electron capture begins and all the electrons and protons will form neutrons, leaving a soup of neutrons in your unbreakable container.

    Now your unbreakable container is a neutron star!

    When you increase the pressure, you will overcome the neutron degenerate matter and might create a quark star (where the neutrons will now only be existing as their constituent particles as the up and down quarks). Now, you will have to increase your pressure to overcome the pressure between these quarks (quark degeneracy pressure).

    And when you overcome this, you will be able to confine all of the matter in that indestructible container into a point, creating the singularity.

  •   [Ask a Geek] Applying uncertainty principle for a macroscopic object #6116

    Hey Jrad,

    Appreciate your curiosity. There are few things I don’t get in your question.

    You have mentioned Δ = 6.625*10-34. I don’t get it. The value is Planck’s constant (h). It should be Δv.

    As far as the answer goes, Δx (uncertainty in position) will be very very very very very :) little for macroscopic objects. And you should not use the uncertainty principle to macroscopic objects like football as you would not be able to observe the teeny tiny variation (a little greater than the extremely small 6.626 x 10-34 Js).

    Said that… The wave-particle duality cannot be observed (as it is too small) for macroscopic objects. But it does not mean that the uncertainty principle only applies to quantum mechanics.

    If we consider the football to behave as a wave, the de Broglie wavelength λ can be found.

    λ = h/p (where p is the momentum)

    λ = h/p = 4.141 x 10-35 m/s (This is a very small value!)

    This is the reason why the football seems deterministic

    If you were to apply HUP to the football, then the uncertainty in position and velocity will both be a minuscule non-zero number. I think your confusion arises from assuming the change in velocity too close to Planck’s constant for ease of calculation. It is evident that the Δx value had to go up to satisfy the relation. When you substitute realistic values (which will still be too small), you will get some agreeable results.

  •   [Ask a Geek] Is my great grandmother somehow connected to her table? #6114

    Right after reading this, I remembered the words of Carl Sagan, “We are made of star stuff.” I thought I could pen down my own version of this answer here.

    Let’s make a quick microscopic picture so that we can ease into the macroscopic world.

    All things are indeed created by molecules. To be precise, all things are made up of elementary particles like electrons, quarks, and constituent particles like protons and neutrons. The combination of these protons, neutrons and electrons in a stable configuration as an atom creates different elements and compounds. Atoms of these elements and compounds together make different molecules, existing in different phases, influencing and reacting with one another. A beautiful harmony the universe plays!

    A human is made up of different kinds of molecules in humongous numbers, forming complex shapes, performing complex chemical reactions, carrying information, replicating, all inside a very sophisticated biological system, which is the result of billions of years of evolution.

    A tree is similar to a human. It is equally sophisticated as a human system, and it has its own number of different molecules and compounds orchestrating a different kind of biochemical stuff. When you make a table out of the wood from the trees, you still retain the chemical composition of the wood, except without the ‘life’ part of it.

    The chemicals that are so common in wood are carbon, oxygen, hydrogen, and nitrogen. A human body has a similar composition too. We are mostly made up of oxygen, carbon, hydrogen, and nitrogen as well.

    Now if we look back the timeline of our solar system, we can understand the origin or source of all these elements around us. Some magnificently violent supernova had bestowed us all the elements necessary to create the sun and the planets and possibly life we know today.

    The oxygen atom in our body comes from the atmosphere, which is actually produced by the trees by photosynthesis. The carbon in the trees comes from the environment as well. But we breath out that carbon into the atmosphere in the first place as carbon dioxide. In a grand scale, all these atoms had come from that solar nebula that formed Earth.

    When your great grandmother was using the table, she was closer to the table. Not for a day, but for years, I assume. The atoms in her skin would have wanted to interact with the atoms in the table whenever she touched, but repelled quite enough by the electrostatic forces. Her DNA would have been all over the table once due to her presence. So would the table still carry her essence? Or technically, will she have affected the table in a way that would have changed the wooden table’s composition according to her comfort?

    In a way, yes. She would have passively affected the chemical composition of the table but in subtle ways. The table might have unique marks made by her or might show some signs of wear and tear from her prolonged use.

    To answer the final question – “Is my great grand-mother some-how connected to that table now?” – Yes, the table is connected to your great grandmother in the same way the table is connected to the universe. But as you are a descendant of her, sharing her genes, the table is connected to you and your great grandmother in a special way.

  •   Easiest way to transfer files from PC to Android using Wi-Fi without internet #7538

    You’re welcome! :) And actually, this seems better! With an FTP client like Filezilla running on the PC, I can keep select folders in sync with the phone too. Especially my music library! Yay! You could try HTTP too! Should get interesting when you start running a server from your phone.

  •   I'm curious about your wallpapers #6454

    Minimalistic! Nice one. For me, it’s all pandas these days! This is my current wallpaper!

  •   Is there a way to remove post processing done by Windows 10 Mobile Camera app? #6208

    It hadn’t occurred to me until now! I’d happily do a hard reset to get the Lumia camera app back! I’m really fed up with Microsoft camera crapp! It’s like they specifically designed it to ruin PureView images. And the stock app supports Dolby surround audio while video recording as well. One more reason to stick with it.

Viewing 15 replies - 1 through 15 (of 84 total)