Part III PHYSICS HSE II Time:2Hours Max:60 Scores 1. Three identical charges each +q are placed at the corners of an equilateral triangle of side d cm. Calculate the force on a +ive charge +2q at the centroid of the triangle. 2 2.If the earth is supposed to be a metallic sphere‚its capacity will be nearly (a) 700pf (b) 700 microfarad (c) 700f (d) 6.4 X10^6 f 1score 3. write the relation between dielectric constant and electric susceptibility. 1score 4. A box encloses an electric dipole consisting
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1. Polar molecules A. have bonds with an unequal distribution of electric charge. B. must form ions in water solution. C. have bonds with an equal distribution of electrical charge. D. have bonds with an overall negative charge. E. have bonds with an overall positive charge. Correct See Section 2.2: How Do Atoms Bond to Form Molecules? Points Earned: 1/1 Correct Answer: A Your Response: A 2. Hydrocarbons are _______ and _______‚ whereas salts are _______ and _______. A. nonpolar;
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Newton’s Laws of Motion and Gravity Define mass‚ weight‚ force‚ and acceleration. Mass – A measure of the total amount of material in a body‚ defined either by the inertial properties of the body or by its gravitational influence on other bodies. It is proportional to‚ but not the same as‚ its mass Force – A quantitative description of the interaction between two physical bodies‚ such as an object and its environment. Force is proportional to acceleration. Acceleration – A vector quantity that
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Atoms Atom is the fundamental building block of all stuff‚ or what scientists like to call "matter". An individual atom is very small. In fact‚ the smallest type of atom‚ hydrogen‚ has a diameter of 10-8 cm. Every single object is composed of atoms. Our body is made up of many‚ many individual atoms. There are also many different types of atom. These different types are called elements. Examples of some elements are hydrogen‚ oxygen‚ and helium. Under normal conditions many atoms can stick together
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QUESTION If copper (II) sulfate when mixed with sodium carbonate at different quantities combine to form ions in definite ratios. HYPOTHESIS / PREDICTION I believe that the ions will combine in definite ratios due to the fact that the valance electrons will not be changing throughout any chemicals; consequently the ions must combine in definite ratios. EXPERIMENTAL DESIGN A technique is performed in which copper (II) sulfate and sodium carbonate are placed together in various test tubes‚ with
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Hall effect was discovered in 1879 by Edwin Herbert Hall while working on his doctoral degree at the Johns Hopkins University. The Hall effect is due to the nature of current in a conductor. Current consists of the movement of many small carriers(electrons‚ holes or both). Moving charges experience the Lorentz force when a magnetic field is present that is perpendicular to their motion. In the absence of the magnetic field‚ the charges follow ‘line of sight’ paths between collisions with impurities
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The picture above shows a typical gel electrophoresis set up. The clear container in the center of the picture is called a gel electrophoresis chamber. It contains the agarose gel that will be loaded with genetic material‚ as well as a buffer solution. It is connected to a DC power supply via electrodes. This picture was taken at Paw Print Genetics laboratory in Spokane‚ Washington. Viney and Fenton (1998) defined the term electrophoresis as‚ “the migration of charged particles through a static medium
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investigate how atoms’ electronegativity value affects the bonds they produce. When two atoms bond‚ a pair of electrons is shared between atoms. Electronegativity is a measure of a single atom’s ability to hoard electrons shared in that bond. In this lab you will work diligently‚ at your own pace‚ to answer a number of questions. To begin‚ from what you’ve already learned about the protons and electrons in an atom‚ what would cause an atom to have a high electronegativity value? _______________________________________________________________________
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Maxwell (UK) - Electro magnetic theory;Light-an electromagnetic wave 7. Heinrich Rudolf Hertz (Germany) - Generation of electromagnetic waves 8. J.C.Bose (India) - Ultra short radio waves 9. W.K.Roentgen (Germany) - X-rays 10. J.J.Thomson (U.K) - Electron 11. Marie Sklodowska Curie (Poland) - Discovery of radium & Polonium; studies on natural radio activity 12. Albert Einstein (Germany) - Explanation of photoelectric effect; Theory of relativity 13. Victor Francis Hess (Austria) - Cosmic Radiation
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inserted into glass tubing using a thin pipe then the pipe is quickly removed‚ and the glass is fused at the end. The neon tube produces the light when an electrical current bombards the gas atoms with electrons knocking neon atoms out of orbit. As a result‚ Electrons collide with other electrons thus causing light. Neon is a colorless‚ tasteless‚ and odorless gas. It’s symbol is Ne‚ and it’s atomic number is 10 on the periodic table. The atomic mass of neon is 20.179. But wait! There’s more. You
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