Ra 89: Fill & Download for Free

You should have mentioned what you are talking about Basic Physics or Advanced Physics. Since Chegg has two categories in Physics as mentioned.The pay rate varies for both different categories. For basic physics your paid less while paid high for advanced physics.Basic Physics - Ra. 89 per questionAdvanced Physics - Rs. 168 per questionHowever, TDS will be deducted per question. Usually, it is a 10% deduction but in 2020 it was a 7% deduction only.

I’ll add a few more thoughts to the good answers that you have already.Polar alignment is aligning the RA axis of the telescope to the celestial poles. Polaris is almost a degree away from the north celestial pole. Aligning to Polaris is good enough for visual observing or planetary astrophotography, but not adequate for the long exposures needed for deep space objects.You can do a fairly accurate polar alignment even in the daytime.Level your tripod.Set the altitude adjustment of your mount to your latitude.Set the azimuth adjustment of your mount to point the RA axis to the north using a compass (be sure to adjust for local magnetic declination).Once polar aligned you can calibrate the RA setting circles on your telescope by pointing the telescope vertically (a level is handy for this) and set the RA indicator on your mount to the local sidereal time.Once the RA setting on your mount is set, you can improve the alignment if Polaris is visible. Just set your telescope to point to the coordinates of Polaris, 2 hr 32 m RA, 89 deg 16 min Dec. and adjust the mount’s altitude and azimuth controls to center Polaris in your eyepiece. Some mounts have a small built in alignment telescope with an analog calibration process that serves the same purpose.Even if Polaris is not visible, you can fine tune a polar alignment to near perfection by a procedure called drift alignment. This iterative process uses two stars near the celestial equator, one near the horizon and one near the zenith to fine tune your alignment.If you have a computer controlled goto mount, it will be able to polar align itself from any two or three bright stars in the sky.Polar alignment is useful even if you don’t have a motor driven mount or want to find objects by their celestial coordinates. Once you’ve found your observing target, you will be able to follow it using just adjustments of the RA axis.

The element is an substance that cannot be decomposed into simpler substances by chemical means, and is made up of atoms all with identical number of protons and electrons. For example, an chemical element can be found on the periodic table. The known elements have atomic numbers from 1 through 118, conventionally presented as Arabic numerals. Since the elements can be uniquely sequenced by atomic number, conventionally from lowest to highest (as in a periodic table), sets of elements are sometimes specified by such notation as "through", "beyond", or "from ... through", as in "through iron", "beyond uranium", or "from lanthanum through lutetium". The terms "light" and "heavy" are sometimes also used informally to indicate relative atomic numbers (not densities), as in "lighter than carbon" or "heavier than lead", although technically the weight or mass of atoms of an element (their atomic weights or atomic masses) do not always increase monotonically with their atomic numbers as names were given locally by various cultures to various minerals, metals, compounds, alloys, mixtures, and other materials. These are also named by IUPAC, which generally adopts the name chosen by the discoverer. For instance, in the periodic table, there are 118 known elements. These are:1HydrogenH2HeliumHe3LithiumLi4BerylliumBe5BoronB6CarbonC7NitrogenN8OxygenO9FluorineF10NeonNe11SodiumNa12MagnesiumMg13AluminumAl14SiliconSi15PhosphorusP16SulfurS17ChlorineCl18ArgonAr19PotassiumK20CalciumCa21ScandiumSc22TitaniumTi23VanadiumV24ChromiumCr25ManganeseMn26IronFe27CobaltCo28NickelNi29CopperCu30ZincZn31GalliumGa32GermaniumGe33ArsenicAs34SeleniumSe35BromineBr36KryptonKr37RubidiumRb38StrontiumSr39YttriumY40ZirconiumZr41NiobiumNb42MolybdenumMo43TechnetiumTc44RutheniumRu45RhodiumRh46PalladiumPd47SilverAg48CadmiumCd49IndiumIn50TinSn51AntimonySb52TelluriumTe53IodineI54XenonXe55CesiumCs56BariumBa57LanthanumLa58CeriumCe59PraseodymiumPr60NeodymiumNd61PromethiumPm62SamariumSm63EuropiumEu64GadoliniumGd65TerbiumTb66DysprosiumDy67HolmiumHo68ErbiumEr69ThuliumTm70YtterbiumYb71LutetiumLu72HafniumHf73TantalumTa74TungstenW75RheniumRe76OsmiumOs77IridiumIr78PlatinumPt79GoldAu80MercuryHg81ThalliumTl82LeadPb83BismuthBi84PoloniumPo85AstatineAt86RadonRn87FranciumFr88RadiumRa89ActiniumAc90ThoriumTh91ProtactiniumPa92UraniumU93NeptuniumNp94PlutoniumPu95AmericiumAm96CuriumCm97BerkeliumBk98CaliforniumCf99EinsteiniumEs100FermiumFm101MendeleviumMd102NobeliumNo103LawrenciumLr104RutherfordiumRf105DubniumDb106SeaborgiumSg107BohriumBh108HassiumHs109MeitneriumMt110DarmstadtiumDs111RoentgeniumRg112CoperniciumCn113NihoniumNh114FleroviumFl115MoscoviumMc116LivermoriumLv117TennessineTs118OganessonOg