Category: Physics

What is laminar mixing? Laminar mixing processes are based on the repeated separation of the flow into layers, followed by redistribution and recombination parallel to the flow direction. The number of layers, and hence the homogeneity, increases with each additional mixing element. What does turbulent flow cause? Turbulence increases the energy required to drive blood […]

Who Solved the 2 body problem? The two-body problem consists of determining the motion of two gravitationally interacting bodies with given masses and initial velocities. The problem was first solved by Isaac Newton in 1687 using geometric arguments. How do you deal with two-body problems? How to Deal with the Two-body Problem Ask support from […]

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 can change wave speed? The speed of a wave is only altered by alterations in the properties of the medium through which it travels. The wavelength of a wave does not affect the speed at which the wave travels. Both Wave C and Wave D travel at the same speed. How is wave speed […]

What is the volume of a mineral sample? Handle your samples to get an idea of how dense each one is, or how heavy each mineral feels for its size. The mass of each sample is measured using a balance or electronic scale. The volume of each sample can be measured (in milliliters) by the […]

Why do electrons want a full outer shell? The valence electrons (outer-most electrons) determine most of the bonding behavior in atoms. Atoms want a full outer shell because it completes all the gaps in the outside. With no gaps, other electrons don’t want to fit into those spaces. For example, a noble gas like Neon […]

What is the reciprocal of a period? The reciprocal of the period, or the frequency f, in oscillations per second, is given by f = 1/T = ω/2π. What is cycle of a wave? A wave is a repeating pattern. It repeats itself in a periodic and regular fashion over both time and space. And […]

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 […]