1 of 22 4.0/ 4.0 Points Who proposed that all of the present continents were once joined together in a single supercontinent called Pangaea? A.Alfred Wegener B.Charles Darwin C.Arthur Holmes D. Harry Hess Answer Key: A Question 2 of 22 4.0/ 4.0 Points The scientific community rejected the theory of plate tectonics because Alfred Wegener could NOT A.identify a mechanism to move the continents. B.disprove competing theories that were not accepted by scientists. C.find
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PART A 1. Buying a new PC. Low Yat Plaza in Jalan Bukit Bintang is a well-known place for computer sales. Assume that you want to buy a new PC for your personal use. Your task is to: i. Make a list of your hardware and software requirements‚ be as specific as possible. (For software‚ you must at least choose 1 type of operating system and 3 application programs.) HARDWARE * CPU (Central Processing Unit): responsible for handling all instructions it receives from hardware components
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CHM130 Lab 2 Measurements: Accuracy and Precision A. Data Tables (36 points) Place your completed data tables into your report here: Data Table 1 Measurement Data Length of aluminum plastic packet 5 cm Height of aluminum plastic packet 6.5 cm Temperature of faucet water 23°C Temperature of ice water 11°C Volume of water in 10-mL graduated cylinder 10 ML Volume of water in 50-mL graduated cylinder 10 ML Data Table 2 Measurement Data Inside diameter of 50-mL graduated cylinder 2.5 cm
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Simple and Fractional Distillation Experiment II Stancy Saji‚ 18 September 2014 Purpose Experiment II involved two kinds of distillation techniques: simple and fractional. Simple distillation was done to separate ethyl acetate—which has a usual boiling point of 77º—from a less volatile component‚ while fractional distillation was done to distinguish an ethyl acetate/n-butyl acetate mixture‚ which has boiling points of 77º and 125 º‚ respectively. Results and Discussion As previously stated the
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Peter Jeschofnig‚ Ph.D. Version 42-0194-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable
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Properties of Gases General Chemistry 1 Lab 5 Abstract: The purpose of this experiment is to examine the properties of several gasses‚ which were the products of a reaction‚ and examine the way the gasses react under certain conditions. These conditions‚ such as introducing a flame to the gas as well as oxygen and CO2‚ caused other reactions to occur. Hypothesis: If the gasses are correctly synthesized then there will be a clear reaction with the introduction of the flame‚ O2‚ CO2‚ Air
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to increase in direct translation to the concentration increasing. The theory surrounding this lab was to see in practice how density could be determined with displacement and then to determine whether the density does in fact increase directly with the concentration. Summary of Key Data Figure 1: From Part 1 Mass of Brass 13.2200g Initial Volume 16.86mL Finial Volume 18.45mL Figure 2: From Part 2 Mass of the Empty 50-mL Flask 37.393g Weight of Flask Filled with 50-mL of Water 87.096g Weight Closest
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Section: Bio 202 labpaq rep 01 LAB REPORT: ENDOCRINE SYSTEM You must get all parts of the question correct to get credit for the question Step 1 (Can be observed on the following slides‚ either from your lab kit or from the Labpaq web site (http://www.labpaq.com/ex-1-endocrine-system)). List the following: · Location in the body of the following structures · Slide #/location observed · One hormone secreted by each Please pay special attention to properties like shapes‚ sizes
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During the experiments a few problems were encountered. One of the chemicals provided differed slightly from chemical description in the lab manual. The lab manual called for the chemical NH3 which is Ammonia. The chemical provided was an Aqueous Ammonia solution of NH4OH. When holding up the solution of AgNO3 and NH4OH to a light source for 5 minutes it was observed that no reactions took place despite the information contained in the lab manual. Also while testing the household chemical Brite‚ It was observed that the Bromthymol Blue changed to a green color that was not
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F° 288K Ice water 1 minute 8 C° 46.4 F° 281K Ice water 5 minutes 5 C° 41.0 F° 278K Object Estimated mass (g) Actual mass (g) Actual mass (Kg) Mechanical pencil 4g 5.55g .00555kg 3 pennies 9g 8.7g .0087 kg 1 quarter 6g-7g 5.75g .00575 kg 2 quarters‚ 3 dimes 13g 18.3g .0183 kg 4 dimes‚ 5 pennies 20g 18.45g .01845 kg 3 quarters‚ 1 dime‚ 5 pennies 28g 34.0g .034 kg Key 6g-7g 7.65g .00765 kg Key‚ 1quarter‚ 4 pennies 25g 24.55g .02455 kg Mass A Mass B Mass B-A Liquid Volume
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