Category: Physics

What tells the cells what to do? Hidden inside almost every cell in your body is a chemical called DNA. A gene is a short section of DNA. Your genes contain instructions that tell your cells to make molecules called proteins. Do cells know they are alive? Cells don’t ‘know’ what to do – they […]

How accurate is Gaia? Even stars near the Galactic Centre, some 30 000 light-years away, will have their distances measured to within an accuracy of 20%. – The Gaia Data Processing and Analysis Consortium (DPAC) consists of more than 400 individuals who will contribute some 2000 person-years of effort to the Gaia data processing exercise. […]

Why the tip of Allpin made sharp? The tip of an allpin is made sharp so that large pressure is exerted at the sharp end and it can be driven into with less effort. What are the two factors which does not change the vertical height of mercury column above the free surface? The density […]

What are the three regular views? Typically, an orthographic projection drawing consists of three different views: a front view, a top view, and a side view. Occasionally, more views are used for clarity. The side view is usually the right side, but if the left side is used, it is noted in the drawing. Where […]

Why do we not see the other side of the moon? We don’t see the far side because “the moon is tidally locked to the Earth,” said John Keller, deputy project scientist for NASA’s Lunar Reconnaissance Orbiter project. If the moon were a perfect sphere, then the gravity felt on the far side and the […]

How does flow rate affect heat transfer? On the other hand, an increase in the heat transfer coefficient is observed if the area is maintained constant. Doubling the mass flow rate will result in a 92% increase in the heat transfer coefficient. However, there is a concomitant increase in the pressure drop, proportional to the […]

Which sublevel is the lowest in energy? 1s Does the 3f sublevel exist? Does the 3f sublevel exist? (Note: the “3” stands for the 3rd energy level.) No, in the 3rd energy level there are only s, p, and d sublevels. The following sublevels exist in the 3rd energy level: 3s, 3p, and 3d. How […]

What is the significance of aphelion and perihelion? Aphelion is the point of the Earth’s orbit that is farthest away from the Sun. Perihelion is the point of the Earth’s orbit that is nearest to the Sun. What is the significance of the Tropic of Cancer quizlet? What is the significance of the Tropic of […]

What fertilizer makes plants grow faster? High-nitrogen fertilizers are known for causing huge growth in plants, which is why many types are rich in nitrogen or include it as the main component. Fertilizers high in nitrogen will also restore bright green hues to your foliage. Which fertilizer works best? Best all-purpose fertilizers Jack’s Classic 20-20-20 […]

What is the formula for lithium chloride? LiCl What does lithium chloride look like? Lithium chloride appears as colorless crystals or powder. Low toxicity. COLOURLESS-TO-WHITE HYGROSCOPIC AND DELIQUESCENT CRYSTALS OR POWDER. What does lithium chloride react with? Reactions with lithium chloride LiCl: LiCl (diluted) + 4 H2O = [Li(H2O)4]+ + Cl-. 2LiCl (solid) + H2SO4 […]