What are the methods to find or design mathematical functions [V(t)=2t^2-16t+32] for physical process or phenomenon?

How exactly we can design this kind of function for physical systems or process? I have already mentioned an example for that above. The above mentioned function tells us about the amount of water...

07 August 2016 6,987 4 View

Why sometimes some concepts of physics and chemistry is very hard to visualize and understand?

As per my understanding, the concepts, theories, laws of science have came from small small assumption of a scientist (best possible, rational) based on visualization of certain phenomenon in...

04 May 2016 3,725 0 View

What is the actual reason and explanation for the phenomenon VAPORIZATION, EVAPORATION, BOILING?

I studied vaporization means phase change of liquid to gas, if it is true then what is evaporation? why vaporization and evaporation takes place and what actually happens in the molecular level in...

07 August 2015 1,972 0 View

What is the difference between Heat and electromagnetic energy?

Heat energy can be transfer by conduction, convection and radiation process but what is the relation of radiation and electromagnetic energy? Can any one please specify. Thank you.

04 May 2015 7,287 4 View

Do our body radiate infrared radiation all the time?

Our body radiate some heat energy but is it radiate infrared? Or it does not radiate anything at all?

04 May 2015 7,909 1 View

Why specific object in this world reflect specific wavelength of light?

Many types of roses are there. RED, BLACK, WHITE etc. It means red rose have pigments that reflect red color and absorb other colors of light. But why this happens to the objects? What is going on...

04 May 2015 2,200 2 View

Do MAGLEV trains use superconductors to float or electromagnets in the train?

03 April 2015 6,890 3 View

Why does a ballast (choke) produce such high voltage in a fluorescent light filament? And also, what is the proper purpose of attaching a starter?

What is the reason for producing high voltage by the ballast(choke) and what is the ballast actually made of?

31 December 2014 2,406 7 View

How climate change will influences human and animal behavioral change?

The role of climate change influencing the human behavior as well as economics interest

01 June 2021 0 0 View

Why almost every element would be metallized in sufficiently high pressure and low temperature?

(This statement is from wikipedia, BTW). What is so special about metallic bond that is limiting high-P low-T state of a matter (as long as individual atoms exist, not white dwarf of neutron star...

02 March 2021 3,309 2 View

What are the countries most affected by extreme rainfall as a result of climate change?

Increased heat, drought and insect outbreaks, all associated to climate change, have increased wildfires. Decreasing water supplies, declined agricultural yields, health impacts in cities owing to...

01 March 2021 7,168 9 View

What are the harmful effects of these extreme rainfall on the health of newborns? What are the reasons for that?

Extreme rainfall associated with climate change is causing harm to babies in some of the most forgotten places.

01 March 2021 5,647 4 View

Heat exchanger with liquid Nitrogen as coolant?

I want to cool Natural Gas from 195 Kelvin to 138 Klevin in a heat exchanger by using liquid nitrogen as the coolant medium. When entering the heat exchanger, the liquid nitrogen will have a...

01 March 2021 6,450 5 View

Any research papers for extraction of nutrient deprivation on macroalgae? Analysed by HPLC-UV and GC/MS. Possibly from macroalgae genus Rhizoclonium?

I am doing my thesis on the nutrient deprivation on the macroalgae Rhizoclonium sp. I will be analysing the levels over a period of roughly 5 days by HPLC-UV and GC/MS. I will be using seawater as...

28 February 2021 6,477 1 View

How to remove fatty material from plant extract?

The resultant solid was partitioned three times with 250 ml of petroleum ether (40-60/c) to remove any fatty material and evaporated to dryness.

28 February 2021 9,464 2 View

How to model the battery pack in PSIM or PSCAD?

Hello, I have simulated a single battery cell using Thevenin equivalent circuit. For a battery pack, I have a large number of cells connected in series and parallel connections. Is there any way...

28 February 2021 2,116 1 View

1 nm thick MgO thin-film to be deposited on Si wafer using thermal evaporation. What will be the optimum deposition conditions?

Favourable conditions of base pressure, rate of deposition. Also, by which characterisation technique to be used to verify the thickness of the deposited film.

28 February 2021 3,640 3 View

Necessary tube lenght to cool Natural gas in a dry-ice cooling bath?

I have a tank which contains natural gas at 250 Bar and 293 Kelvin. I want to cool the gas in a dry-ice cooling bath to about 195 Kelvin. The gas will flow in a copper-tube through the bath with a...

27 February 2021 8,128 1 View