Instruction Manual and Experiment Guide for the PASCO scientific Model ME-8569 012-04774A 1/92 DENSITY SET Copyright © January 1992 $5.
012-04774A Table of Contents Section Page Copyright, Warranty, and Equipment Return ................................................... ii Introduction ...................................................................................................... 1 Equipment ......................................................................................................... 1 Replacement Parts ............................................................................................
012-04774A Copyright and Warranty Please—Feel free to duplicate this manual subject to the copyright restrictions below. Copyright Notice will repair or replace, at its option, any part of the product which is deemed to be defective in material or workmanship. This warranty does not cover damage to the product caused by abuse or improper use. Determination of whether a product failure is the result of a manufacturing defect or improper use by the customer shall be made solely by PASCO scientific.
012-04774A Introduction The PASCO Model ME-8569 Density Set allows useful experiments in density, buoyancy force, and specific heat as well as providing an effective means of distinguishing between length, volume, and area.
012-04774A Replacement Parts ITEM PASCO PART NUMBER aluminum cylinder 648-04768 aluminum block 648-04772 brass cylinder 648-04770 brass block 648-04771 polypropylene cylinder 648-04769 aluminum irregular shape 648-04773 2 scientific
012-04774A Experiment #1: Length, Area, and Volume Calipers (SF-8711) B. Using the calipers, measure the width and height of one end of each of the blocks. Calculate the area of the end of the block by multiplying the width by the height. Record the results in Table 1.1. String (SE-8050) III. VOLUME Overflow can (SE-8568) A. By Calculation Beaker for catching water For each of the regularly-shaped objects, calculate the volume by multiplying the area of one end by the length of the object.
012-04774A Measure the volume of water that was displaced by reading the water level in the graduated cylinder in milliliters (1 ml = 1 cm3). Record this volume in Table 1.1. ANALYSIS For each of the regular objects, calculate the percent difference between the two values found for the volume. 5. Repeat this procedure for the other objects. Note that the plastic object will float in water so it cannot be used in this part of the experiment. QUESTIONS 1. Which objects have nearly the same volume? 2.
012-04774A Experiment #2: Density REQUIRED EQUIPMENT: II. DISPLACED VOLUME Density set: brass cylinder and brass block For each of the two brass objects, find the volume by finding the volume of water that each one displaces: Calipers (SF-8711) 1. Put the beaker under the overflow can spout as shown in Figure 1. String (SE-8050) Overflow can (SE-8568) 2. Pour water into the overflow can until it overflows into the beaker.
012-04774A QUESTIONS 1. Which object took up more space? 2. Which object weighed more? 3. Which object was more dense? Table 2.
012-04774A Experiment #3: Bouyant Force REQUIRED EQUIPMENT: Density set String (SE-8050) Overflow can (SE-8568) Beaker for catching water Graduated cylinder (50 ml) Triple-beam balance (SE-8708) PURPOSE: This experiment measures the buoyant force on an object in water by using Archimedes’ Principle and by finding the upward force on the object while it is submerged. PROCEDURE Figure 1: Overflow Setup I. ARCHIMEDES’ PRINCIPLE 2. Pour water into the overflow can until it overflows into the beaker.
012-04774A 5. Calculate the mass of the water by subtracting the mass of the beaker. Then calculate the weight of the displaced water by multiplying by the acceleration due to gravity (9.8 m/s2). Record the result in Table 3.1 and Table 3.2. Thus the buoyant force can be calculated by finding the difference between the weight of the object in air and the apparent weight of the object when it is submerged in water. 1. Put the triple-beam balance on top of a stand as shown in Figure 3.
012-04774A 3. While the object is still hanging from the balance, submerge the object in a beaker of water so that the entire object is under water but it is not touching the sides or bottom of the beaker. Record the reading on the scale and multiply by gravity to get the apparent weight. Record in Table 3.2. QUESTIONS 1. In each case, is the buoyant force found using the difference between weights equal to the weight of the water displaced? 2. Which objects had the same buoyant force when submerged? 4.
012-04774A Notes 10 scientific
012-04774A Experiment #4: Specific Heat EQUIPMENT REQUIRED: Density set: Aluminum and Brass cylinders and blocks String (SE-8050) Beaker for heating water Submerge mass in water Styrofoam cup Cold water Triple-beam balance (SE-8708) Bunsen burner Heating stand Thermometer (SE-9083) PURPOSE: This experiment shows that the specific heat of a material depends on the type of material but not on the amount of material.
012-04774A Thermometer 7. When the object is cooled in the water, the heat lost by the object is equal to the heat gained by the water because energy is conserved (neglecting any losses to the environment): Submerge mass in water ∆QOBJECT = ∆QWATER (mc∆T )OBJECT = (mc∆T )WATER Solving for the specific heat of the object gives: c= Figure 2: Equilibrium Temperature mWATERcWATER (∆T )WATER mOBJECT(∆T )OBJECT where cWATER is 1 cal/g °C.
Technical Support Feedback Contacting Technical Support If you have any comments about the product or manual, please let us know. If you have any suggestions on alternate experiments or find a problem in the manual, please tell us. PASCO appreciates any customer feedback. Your input helps us evaluate and improve our product.
