What's the sharpest knife on earth? - Physics Forums
2009年7月29日 · Can any knife be sharpened to become the sharpest on earth? In theory, any knife can be sharpened to become extremely sharp. However, knives made of high-quality materials such as carbon steel or ceramic are easier to sharpen and can achieve a sharper edge than those made of lower quality materials.
Knife edge thickness/surface area - Physics Forums
2008年11月19日 · The ideal knife edge thickness can vary depending on the type of knife and its intended use. For example, a chef's knife may have a thinner edge for precise cutting, while a hunting knife may have a thicker edge for durability. It is important to consider the purpose of the knife when determining the ideal thickness.
What is the best knife blade metal for long-lasting sharpness when ...
2009年2月1日 · The best metal for knife blades is subjective and depends on the intended use of the knife. However, some popular options include stainless steel, carbon steel, and Damascus steel. Each of these metals has its own unique properties and benefits for knife blades. Is stainless steel or carbon steel better for knife blades?
Physics Forums: Science Discussion, Homework Help, Articles
2024年12月13日 · Join Physics Forums, where students, scientists, and enthusiasts come together to explore and discuss the current understanding and practice of various scientific fields.
How Does Rope Length Affect Tension in a Vertical Two-Mass …
2007年9月6日 · The objects are suspended vertically near the surface of the Earth, so that one object is hanging below the other, and then released. Find the tension in the rope after the objects are released. Use proper approximations to express the tension as a function of m, L, mass of the Earth M, radius of the Earth R, and gravitational constant G.
Why does air rush into a vacuum? - Physics Forums
2011年1月20日 · In space, there is no air pressure, so air cannot rush into a vacuum as it does on Earth. However, in a closed system, such as a spacecraft or space station, air can be released from the pressurized environment, creating a rush of air into the vacuum of space. Is it possible for air to rush out of a vacuum?
Raising / Lowering a 40' aluminum antenna tower - Physics Forums
2023年10月25日 · BTW, you probably already know this, but if you have a couple of helpers who can assist with the initial part of the mast lift while you are cranking the winch, that will lower the peak tension and cranking effort. The hardest part is when the tower is on the ground, because the angle ##\theta## is the sharpest.
Special relativity thought: Traveling to the future relative to a particle
2024年12月1日 · In that case, we mean "...relative to the surface of the Earth". We can get away with being sloppy in that context because it's widely understood what we mean. We cannot get away with it in relativity, though, because we typically discuss circumstances floating in space, or we are explicitly considering measurements made relative to different ...
Finding the Mass of a Meter Stick (Torque and Balance) - Physics …
2017年11月8日 · Attach a 216.82 g mass at the 90 cm position. Red-adjust the position of the knife edge such that the meter stick is once again balanced. Determine the mass of the meter stick without using the balance. 2. Homework Equations Torque = force * distance from center F=ma T1+T2 = 0 The Attempt at a Solution
Saha Equation In Plasma for Muons - Physics Forums
2024年4月30日 · I am currently working on the determining the viability of muon-catalyzed fusion in a dense but tepid plasma and the first question pertains to the formation of muonic atoms once muons are injected into the plasma. Suppose the plasma is sufficiently dense such that pressure ionization ensures...