Anas Alsofayan Lab 1 PHYS101 02k Exercise 1 Q1 What patterns do you observe based on the information in Table 4 The number of fish in fluid is not directly proportional to the dissolved oxygen in the fluid Q2 Develop a hypothesis relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of water With the increase in number of fish the dissolved oxygen also increases Q3 What would your experimental approach be to test this hypothesis Initially a container can be filled with a fixed amount of water Then we would start placing fish in this container With the placement of each fish dissolved oxygen must be observed and recorded This data will help us analyze the changes and lead us towards a reasonable conclusion Q4 What would be the independent and dependent variables Independent variable Fish Dependent Variable Dissolved Oxygen Q5 What would be your control Water Q6 What type of graph would be appropriate for this data set Why Bar graph would the best fit for this collected data because we see that the dissolved oxygen level changes with the number of fish Q7 Graph the data from Table 4 Number of Fish 16 14 12 10 8 6 4 2 0 0 2 4 6 8 10 12 14 16 18 Number of Fish Q8 Interpret the data from the graph made in Question 7 The graphed data above shows that initially the dissolved oxygen increases with the increase in fish but there is a sudden decrease in number of fish after 12ppm whereas the dissolved oxygen level continues to increase Thus we have enough data to say that dissolved oxygen level is not directly proportional to the number of fish Exercise 2 Q1 A plant grows three inches faster per day when placed on a window sill than it does when placed on a on a coffee table in the middle of the living room Determine if the observation is qualitative or quantitative Quantitative Write a hypothesis and a null hypothesis Hypothesis If a plant id placed on a windows sill it grows 3 inches faster then when the same plant placed on a coffee table in the middle of the living room What would be your experimental approach Take two identical plants and keep one on a windows sill and the other on a coffee table Observe them for four weeks and meanwhile provide them the same amount of water every day and keep them ion the same temperature At the end of four weeks both the plants will be measured and compared What are the dependent and independent variables Independent Variable Location of plant Dependent Variable Plant Length Control Water Temperature What are your controls both positive and negative Negative Control Water Positive Control Temperature How will you collect your data Measuring Plant with a measurement tape How will you present your data e g chart graph Line Chart How will you analyze your data Analyze through the changes in Data Q2 The teller at the bank with brown hair and brown eyes is taller than the other tellers Not Testable Q3 When Sally eats healthy foods and exercises regularly her diastolic blood pressure is 10 points lower than when she does not exercise and eats fatty foods Determine if the observation is qualitative or quantitative Quantitative Write a hypothesis and a null hypothesis Hypothesis If Sally eats healthy food and exercise then her diastolic blood pressure is 10 percent lower What would be your experimental approach For a week Sally eats healthy food and exercise and check the blood pressure everyday The next week she eats unhealthy foo d and stop exercising at all And check the blood pressure everyday What are the dependent and independent variables Independent Variable Food Calorie Burnt Calories Dependent Variable Blood Pressure Control Temperature What are your controls both positive and negative Negative Control None Positive Control Temperature How will you collect your data Blood Pressure Monitor How will you present your data e g chart graph Line chart with two lines representing the two cases individually How will you analyze your data Analyze through the two lines drawn Q4 The Italian restaurant across the street closes at 9 pm but the one two blocks away closes at 10 pm Not Testable Q5 For the past two days the clouds have come out at 3 pm and it has started raining at 3 15 pm Determine if the observation is qualitative or quantitative Qualitative Write a hypothesis and a null hypothesis Hypothesis If the cloud comes out at 3pm then the rain will start at 3 15pm What would be your experimental approach For a week we observe the time when clouds first arrive and also record when it rains everyday What are the dependent and independent variables Independent Variable Rain Dependent Variable Time of Rain Control Weather What are your controls both positive and negative Negative Control None Positive Control Weather How will you collect your data Through human observation How will you present your data e g chart graph Bar Graph How will you analyze your data Analyze through the bar graph Q6 George did not sleep at all the night following the start of daylight savings Not Testable Exercise 3 1 46 756 790 mg 46 76 kg 2 5 6 hours 20160 seconds 3 13 5 cm 5 31 inches 4 47 C 116 6 F Exercise 4 1 During gym class four students decided to see if they could beat the norm of 45 sit ups in a minute The first student did 64 sit ups the second did 69 the third did 65 and the fourth did 67 Accurate 2 The average score for the 5th grade math test is 89 5 The top 5th graders took the test and scored 89 93 91 and 87 Precise 3 Yesterday the temperature was 89 F tomorrow it s supposed to be 88 F and the next day it s supposed to be 90 F even though the average for September is only 75 F degrees Neither 4 Four friends decided to go out and play horseshoes They took a picture of their results shown to the right Neither 5 A local grocery store was holding a contest to see who could most closely guess the number of pennies that they had inside a large jar The first six people guessed the numbers 735 209 390 300 1005 and 689 The grocery clerk said the jar actually contains 568 pennies Both Exercise 5 Part 1 Determine the number of significant digits in each number and write the specific significant digits 1 405000 6 significant digits 2 0 0098 2 significant digits 3 39 999999 8 significant digits 4 13 00 4 significant digits 5 80 000 089 8 significant digits 6 55 430 00 7 significant digits 7 0 000033 2 significant digits 8 620 03080 8 significant digits Part 2 Convert each number into scientific notation 1 70 000