Structure of Matter | | 1. | An element consists of three isotopes in the relative abundance given below. What is the atomic mass of this element? | | 30.00% = 40.00 amu50.00% = 41.00 amu20.00% = 42.00 amu | | (A) | 40.90 | | (B) | 41.00 | | (C) | 41.90 | | (D) | 42.20 | | (E) | 42.90 | | | 2. | The total number of electrons that can be accommodated in the fourth principal energy level is _____ | | (A) | 2 | | (B) | 8 | | (C) | 18 | | (D) | 32 | | (E)
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What keeps the stopper moving in a circle? Purpose: Relate the variables involved in uniform circular motion Hypothesis: I predict that the velocity of the stopper will increase as the radius is shortened. Rubber stopper with a hole PVC tube or wooden spool 1. Measure the mass f the stopper and washer‚ m‚ and record it in the data and observations section. Then‚ prepare the experimental apparatus as shown in figure A. 2. Throughout this experiment‚ you will need to maintain a constant
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Kinematics / Projectiles x =?vt ?v = (v + vo)/2 v = vo + at x = vot + ½at2 v2 = vo2 + 2ax y =?vt ?v ’ ½(vo + v) v = vo – gt y = vot – ½gt2 v2= vo2 – 2gy R = (v02/g)sin(2θ) Forces Fnet = ma Fgravity = mg Ffriction ≤ μsN Ffriction = μkN Circular Motion Fnet = mv2/r ac = v2/r v = 2πr/T f = 1/T T = 1/f Gravitation F = GM1M2/R2 g = GM/R2 T2/R3 = 4π2/GM = constant GM = Rv2 Energy W = Fdcosθ KE
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Motion NCERT Chapter Questions and Answers and other Q & A Q1: An object has moved through a distance. Can it have zero displacement? If yes‚ support your answer with an example. Answer: Yes an object can have zero displacement even though it has moved through a distance. It happens when the object moves back to its original position i.e. final position coincides with the starting position. Example: Suppose an object travels from O to C and then comes back to original position O. Total
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Donald G. Hill‚ Ph.D. Consulting Petrophysicist The World is my District California Registered Geophysicist 170 California Registered Geologist 6043 Kentucky Registered Professional Geologist 1624 Texas Licensed Professional Geophysicist 6289 Petrophysics‚ Borehole Geophysics‚ and Subsurface Geology Planning‚ Oversight‚ and Interpretation 1012 Hillendale Ct. Walnut Creek‚ CA 94596 e-mail: dgh@hillpetro.com Phone: +(925) 437-5748 Cell: +(925) 437-5748 FAX: +(309) 420-7354 http://www
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MULTIPLE CHOICE QUESTIONS 1. A KILOMETER IS APPROXIMATELY A. 2 Miles B. ½ Mile C. 1/10 Mile D. ¼ Mile 2. 55 miles/hour is approximately A. 90 km/h B. 30 km/h C. 10 km/h D. 2 km/h 3. By what factor does the volume of a cube increase if the lengths of the edges are doubled? A. 16 B. 8 C.4 D. 2 E.√2 4. If the length of a box is reduced to one-third of its original value and the width and height are doubled‚ by what factor has the volume changed? A. 2/3 B.1 C. 4/3 D. 3/2 E. depends on relative proportion
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Candidate Name: Riddhi Chaknalwar Candidate Number: 001226038 May 1‚ 2012 ACCELERATION OF A FREE FALL
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JAR 66 CATEGORY B1 engineering uk MODULE 2 PHYSICS 1 MATTER ....................................................................................... 1-1 1.1 NATURE OF MATTER.............................................................. 1-1 1.1.1 Si units ................................................................... 1-1 1.1.2 Base Units.............................................................. 1-1 1.1.3 Derived Units ........................................................
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ULTRASOUND PHYSICS Name Institution a) Calculate the Acoustic impedance of subcutaneous tissue‚ muscle and bone. Assume subcutaneous tissue has a density of 1060kg/m3 (Hedrick 2003)‚ muscle has a density of 1104kg/m3 (Madjor 2008) and bone has a density of 5065kg/m3 (Hedrick 2003). Give your answer in Mrayls. Please use speed of sound as 1540m/s for tissue‚ muscle and bone In ultrasound‚ Acoustic impedance (Z) is the quantity of measurement of resistance to sound when passing through a medium
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ours‚ our findings can hardly pale into insignificance as errors and the cause of uncertainty are discussed and ways to improve the experiment are suggested‚ which can possibly spur further studies on this realm of knowledge. I. Introduction In physics‚ there are mainly two ways from which useful equations can be derived. One from them is to make good use of the mathematical expression of the theories formulated by our predecessors. An archetype to this notion is the Newton’s second law‚ which states
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