Question 1 There is a common assumption that cold water boils more quickly than hot water. Develop a strategy to investigate this theory. a. Construct a well thought out question. b. State a testable hypothesis. c. Design an experiment to test your hypothesis. Include an explanation of how the data you collect will be able to support or refute the hypothesis. Identify independent and dependent variables.

er B. Graphing Exercises: Construct a graph for each of the following sets of data. Using the graphs that you make, answer the questions below for each graph. 1. Students measured the mass and the volume of various samples of a metal and the results below were obtained. Mass (grams) Volume (cubic centimeters) or cm3 ()1.5 12.3 28.5 3.5 frie 42.0 5.0 59.5 7.3 (S) 78.2 9.6 12.0 99.0 What basis observation can be made concerning the mass-volume relationship? a. Page 9 of 12 Lab 2

Charle's Law states that for a given mass of a gas at constant pressure, the volume is directly proportional to its thermodynamics temperature. A certain gas has a volume of 2.25 L at a temperature of 320K. a. Determine the constant of proportionality. b. Determine the volume of the gas at a temperature of 420K. c. Determine the temperature of the gas at a volume of 2.615 L

2. Which of the following would result to a random error? * A. The flow of air causing the reading of the temperature to change from time to time. B. A volumetric cylinder that is used to measure the volume of the liquid has a bump on the cylinder. C. An electronic scale shows a mass of 0.1 kg before we put something on it. D. A student uses a ruler and reads his measurement always on one side of the reading. E. A cloth tape measure that you use to measure the length of an object had been stretched out from years of use.

An object was left in a room of unknown surrounding temperature. The temperature of the object was summarized below with respect to the time t (in minutes) the object was initially observed. Predict and complete the information, i.e. determine the temperature in Celsius when t = 30 minutes. Put your answer accurate up to four decimal places. No need to put in the units of measurement. When t = 0, the temperature of the object is 30 degrees Celsius. When t = 10 minutes, the temperature of the object is 32 degrees Celsius. When t = 20 minutes, the temperature of the object is 33.6 degrees Celsius. When t = 30 minutes, the temperature of the object is unknown. Assume the system obeys Newton’s Law of Cooling and the surrounding temperature of the room did not change.

Q1: Using the statistical method to derive the most probable distribution? Q2: What are a and B? Q3: Define the statistically of the temperature?

The average mass of a human liver is 1.5 KG.  convert this quantity to. A. Grams B. Ounces.

Consider an ideal gas with an absolute temperature of ?1.T1. To what temperature would the gas need to be heated to double its pressure? Express the answer in terms of ?1.T1. ?2=   Consider an ideal gas with a volume of ?1.V1. To what volume would the gas need to be compressed to double its pressure? Express the answer in terms of ?1.V1. ?2=V2=

Which of the following sets of data shows the MOST precise measurement if the real mass of an object is 60 grams? A. 50 g, 60 g, 70 g C. 50 g, 55 g, 60 g B. 12 g, 24 g, 33 g D. 20 g, 40 g, 60 g

B. What is the mean (average ) length of a glass bead ? 1. There are five numbered glass beads in your container . 2. Measure the length of each glass bead at its longest point to the nearest tenth of a centimeter . Convert your measurements to millimeters . 3 Record your data in Table 1 below and divide the total by 5 to obtain the mean length of your glass beads in cm and . 4. Put your mean results on the board and then find the mean of the class data . Table 1. Length Measurement Data Glass Bead 1 2 3 4 5 Total Mean mm 5. What is the mean length of a glass bead as measured by your class ? cm וו