WAVES & SOUND Refraction waves bending when passing through different materials/medium Doppler Effect the effect of a change in frequency‚ resulting from relative motion between source of wave & observer Sound Intensity loudness‚ rate at which energy flows through an area perpendicular to direction of wave Beats 2 waves of similar frequency causing interference heard as beats Reflection Occurs when particles bounce off one another in opposite direction Decibel
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Solve the ff. 1. A sample of He occupies 520 mL at 950 Torr and 25°C. If the sample is transferred to a 1.1-L flask at 25°C‚ what will be the gas pressure in the flask? 2. A balloon has temperature of 28°C. What will be the final temperature of the gas if the volume is reduced to half of the original under isobaric condition? 3. Calculate the volume occupied by 4.23 kg of methane gas at STP. 4. Dry ice is useful in maintaining frozen foods because it vaporizes to CO2 (g) rather than melting
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Elements Atomic No At. Mass Valency Elements At.No. At.Mass Valency Hydrogen(H) 1 1 (+1) Silicon(Si) 14 28 (+4) Lithium(Li) 3 7 (+1) Germanium(Ge) 32 73 (+4) Sodim(Na) 11 23 (+1) Tin(Sn) 50 119 (+4‚+2) Potassium(K) 19 39 (+1) Lead(Pb) 82 207 (+4‚+2) Rubidium(Rb) 37 85 (+1) Nitrogen(N) 7 14 (-3‚+5) Cesium(Cs) 55 133 (+1) Phosphorus(P) 15 31 (+3‚+5) Francium(Fr) 87 223 (+1) Arsenic(Ar) 33 75 (+3) Beryllium(Be) 4 9 (+2) Antimony(Sb)
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LAB ACTIVITY 1 MEASUREMENTS IN SCIENCE: MASS‚ VOLUME‚ AND DENSITY Purpose: The purpose of this experiment is find the density of two metals using their mass and volume. Introduction: The purpose of the experiment that was conducted was to measure and calculate the density of two different metals. Density is an important characteristic of a material. The density of an object shows how much mass is contained in the unit volume. To calculate the density of metals the experimenters had to find
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What are some of the measures we can take to reduce global warming? Since there is already a great number of green house gases already trapped in the earth’s atmosphere the major effect of global warming can never really be completely eliminated. CFC’s stay in the atmosphere for literally hundreds of years‚ and therefore even if we were to stop all activities releasing greenhouse gases into the atmosphere there would still be a major heat load trapped in the earth’s atmosphere. Since we cannot
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E) 16.0 2) A sample of a gas (5.0 mol) at 1.0 atm is expanded at constant temperature from 10 L to 15 L. The final pressure is __________ atm. A) 1.5 B) 7.5 C) 0.67 D) 3.3 E) 15 3) A balloon originally had a volume of 4.39 L at 44 °C and a pressure of 729 torr. The balloon must be cooled to __________°C to reduce its volume to 3.78 L (at constant pressure). A) 38 B) 0 C) 72.9 D) 273 E) 546 4) If 3.21 mol of a gas occupies 56.2 L at 44 °C and 793 torr‚ 5.29 mol
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The Big Bang Theory What is the Big Bang Theory? The Big Bang is the dominant (and highly supported) theory of the origin of the universe. In essence‚ this theory states that the universe began from an initial point or singularity which has expanded over billions of years to form the universe as we now know it. In 1959 a survey was conducted of scientists across America concerning their understanding of the physical sciences. One particular question asked “What is your concept of the age of
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superhiEssay: My Life As A Superhero Lately I’ve been pondering the subject of superheroes. Everyone has their favorite – mine is Batman – and I think everyone at some time has fantasized about being one. I know I have. Of course‚ unlike Batman‚ who uses cunning‚ strength‚ battle expertise and a bizarre psychological makeup to his advantage‚ I’m thinking that having superpowers might be one of the prerequisites of the job. Unfortunately‚ most of the powers that are of interest to me‚ especially
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Vincent Rafael P. Violago 1BSBA2 ACADEMIC READINGS The Triune Brain The first of our three brains to evolve is what scientists call the reptilian cortex. This brain sustains the elementary activities of animal survival such as respiration‚ adequate rest and a beating heart. We are not required to consciously “think” about these activities. The reptilian cortex also houses the “startle centre”‚ a mechanism that facilitates swift reactions to unexpected occurrences in our surroundings. That panicked
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Cebu Institute of Technology – University Cebu City PHYSICS DEPARTMENT Physics 201 – G01/M02 Name/Course/Year: Noel S. Alvarez BSIT – II Date Submitted: November 29‚ 2012 Experiment No. 1 Group No./Time/Day: 3 / 12NN-3PM/Thurs MEASUREMENT‚ ERRORS AND DENSITY I. Objective: a. To know the principles of good measurement and to compare the precision and accuracy of some commonly used measuring devices. b. To study the types‚ causes and effects of errors in measurement
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