One of my favorites! So they don't fall in the hole. A friend of mine from Pakistan heard that and exclaimed, "Thats true! Back home they are triangular and fall in hole sometimes".
Earth rotation is slowing by about 1.7 milliseconds per century. Probably the largest reason is the pull of the moon's gravity on tides. The moon is gradually moving away from Earth. My understanding is that this will go on for a long time - continuing long after the sun has increased in size and evaporated and blown off Earth's oceans. I fully admit that is forever in human terms!
Look up "The Heat Death of the Universe" And then realize that something like 300,000 times as much energy exists at the ground state as does at higher than the Ground State. The Actual Heat Death of the Universe took place long, long ago,. We are part of the final expiring throes of everything. A tiny blip before endless death.
Me thinks someone learned this in skool and rushed to make a topic about it thinking no one else knew about thermodynamics. Pure embarrassing
Still thermodynamics.. Like I said before any non college educated redneck grease monkey nascar fan knows this.
Ok there are four ..and I will explain it by copying and paste.. There are 4 laws to thermodynamics, and they are some of the most important laws in all of physics. The laws are as follows Zeroth law of thermodynamics – If two thermodynamic systems are each in thermal equilibrium with a third, then they are in thermal equilibrium with each other. First law of thermodynamics – Energy can neither be created nor destroyed. It can only change forms. In any process, the total energy of the universe remains the same. For a thermodynamic cycle the net heat supplied to the system equals the net work done by the system. Second law of thermodynamics – The entropy of an isolated system not in equilibrium will tend to increase over time, approaching a maximum value at equilibrium. Third law of thermodynamics – As temperature approaches absolute zero, the entropy of a system approaches a constant minimum
OIC, OK, I've always understood that 0 and 4 are either special cases or derivations of 1 and 2 but I understand lots of things that aren't so.
I can't, I remember I saw it in George Gamow's book 1, 2, 3, Infinity, You can look there yourself and see if you understand it. I take multiple Nobel nominees on faith.
Newton's theory of gravity doesn't work around black holes, its been debunked. https://www.google.com/amp/s/www.nbcnews.com/mach/amp/ncna1038671
Someone with no training in science would see it that way. Newton's laws work in their domain of applicability, as do all theories in physics. Explain what I mean.
Since frictional forces are strictly a function of force and the coefficient of friction, the area drops out of the equation and in terms of friction, the width of the tire doesn't matter. But as you indicated, if you want to add rubber for a longer service life, you can go wider. The rotational inertia goes as the square of the radius, whereas it goes as the width, and not the square of the width. So it takes more energy get get a taller tires spinning, than it does a wider tire. So if you double the height of the tire, it takes 4 times as much energy to get it moving. If you double the width, it only takes twice the energy. There are other dynamics, such as the height of the wall and its ability to withstand the forces and not rip the tire apart. I remember reading that there are actually Ph,D papers written that cover other factors.
Nope, solenoids = losses, inverter = losses, batteries = losses Current flowing in wires = losses, Motor = losses Generator = losses But it would make a nice heater. Total instantaneous power is volts x amps x cos(a), where a is the phase angle The total power is independent of the voltage used. Voltage goes up, current goes down. Power remains the same, minus losses
And a lousy attitude and surfing the net doesn't equal an education. Nor does intelligence equal an education. That is why the smartest people in the world almost always have advanced degrees. You need both, high intelligence and an education, to accomplish anything in science. What many people do here is called crackpottery.
Great point! You are hitting on the same aspect of the problem in a different way. The total weight acting on the tire goes as pounds per square inch of contact area. So as much as you increase the total contact area, you also reduce the pounds per square inch. Strictly speaking, that is why the frictional forces are independent of the area, and depends only on the total weight on the tire, in this case, and the coefficient of friction. But you are right that it gets more complicated for any real application.
Forces due to friction are independent of contact area. But it is a great point that making a wider tire doesn't ensure that much greater contact area.