Category: Physics

What is the critical angle of ice? 49.8 degrees How do you find the critical angle in Snell’s law? The critical angle can be calculated from Snell’s law by setting the refraction angle equal to 90°. For any angle of incidence less than the critical angle, part of the incident light will be transmitted and […]

What is steam reforming process? Steam reforming or steam methane reforming is a method for producing syngas (hydrogen and carbon monoxide) by reaction of hydrocarbons with water. Commonly natural gas is the feedstock. The main purpose of this technology is hydrogen production. The reaction is strongly endothermic (consumes heat, ΔHr = 206 kJ/mol). What is […]

What are the pros and cons of no-till farming? Here’s a short list of no-till pros and cons. Pro: Savings. Con: Special Equipment Costs. Pro: Water Conservation. Con: Fungal Disease. Pro: Less Herbicide Runoff. Con: More Herbicides. Pro: Higher Crop Yields. Con: You Need Patience. What are the disadvantages of no-till farming? Disadvantages With no-till […]

How fatigue crack is detected using edge current inspection? Fatigue cracks tend to occur at bolt-jointed structures on an aircraft. In order to detect the damage quantitatively, a kind of change-prone micro eddy current sensor is designed and fabricated with flexible printed circuit board (FPCB) technology. Which wave is used in metal cracks detection? Ultrasonic […]

How do you get activation energy? Activation Energy Problem Step 1: Convert temperatures from degrees Celsius to Kelvin. T = degrees Celsius + 273.15. T1 = 3 + 273.15. Step 2 – Find Ea ln(k2/k1) = Ea/R x (1/T1 – 1/T2) Answer: The activation energy for this reaction is 4.59 x 104 J/mol or 45.9 […]

What is the strongest bungee cord? Here are the six best bungees, no matter how you choose to use them. Kotap Adjustable 24-Inch Bungee Cords, 10-pack. Cartman Bungee Cords 24-piece Assortment Jar. FORTEM Premium Quality Bungee Cord Hook Assortment. Strapright Bungee Cord with Carabiners. Super Smithee Heavy Duty Bungee Cords. How far will a 72 […]

Do not stand too close to moving? “ When a train moves, there is a matter wave attached to it. Waves move from positive to negative. Outside of train is positive and inside is negative. So, the train may pull us towards it if we stand very close to it.” Why do we get pulled […]

What is the charge of an electron? Electrons. Electrons are found in the periphery of the atom and have a charge of -1. They are much smaller than protons; their mass is 11836 amu. Typically in modeling atoms, protons and neutrons are regarded as stationary, while electrons move about in the space outside the nucleus […]

What is visible on the moon? One side of the moon always faces Earth. Even so, over time, it’s possible to see as much as 59% of the moon’s surface, due to lunar libration. Lunar libration lets us see more than 50% of the moon. One half of the moon always faces Earth, and one […]

Can autopsy be performed without consent? Yes, an autopsy can be ordered by authorities without relatives’ consent in several situations. If an autopsy is not required by law or ordered by authorities, the deceased person’s next of kin must give permission for an autopsy to be performed. Can an autopsy be requested? Can anyone request […]