Lab+2+Density

Aaron Hanna

1. Do ice and water have the same density 2. How does moving from salt water to fresh water affect a ship? 3. Why does a helium balloon rise in the air?
 * Weight and Volume Video Questions**
 * Ice and water have different densities than each other because ice cubes float in water**
 * A ship carrying it's heaviest capicity in salt water would have to decrease it's cargo before entering fresh water. This would have to happen because fresh water is less than salt water. Therefore, if cargo wasn't properly removed the ship would sink in fresh water**
 * A helium balloon rises in air because helium's density is less than water, which causes it to float in air**


 * Weight and Volume**

Materials Used: small marble medium marble large marble metric ruler scale dice

Methods 1. Used scale to measure the mass of small marble, medium marble, large marble, and dice 2. Used metric ruler to determine the volume of small marble, medium marble, large marble, and dice -small marble: Diameter:1.5cm Volume: (1.5^3x3.14)/(6)=1.76cm*3 -medium marble: Diameter: 2cm Volume: (2^3x3.14)/(6)=4.19cm*3 -large marble: Diameter: 4cm Volume: (4^3x3.14)/(6)= 33.49cm*3 -dice: Height:1.6cm Length: 1.6cm Width: 1.6cm Volume: 4.096cm*3 3. Density calculated by dividing weight in grams by volume 4.We didnt have access to a stick of butter, so our TA improvised by using a block of wood -Block of Wood Volume: length:9.5cm width: 9cm height:3.7cm= 316.35cm*3
 * Objects Name: || Weight (g) || Volume cm*3 || density g/cm*3 ||
 * 1.Small Marble || 3.6g || 1.76cm*3 || 2.05g/cm*3 ||
 * 2.Medium Marble || 12.1g || 4.19cm*3 || 2.89g/cm*3 ||
 * 3. Large Marble || 198.8g || 33.49cm*3 || 5.94g/cm*3 ||
 * 4. Dice || 8.8g || 4.096cm*3 || 2.15g/cm*3 ||

Materials: Graduated cylinder small marble medium marble large marble dice scale
 * Weight and Displacement**

Methods 1.Used scale to mass object 2. Poured 100mL of water into graduated cylinder 3. Placed items into cylinder to find their displacement 4. Calculated density by dividing mass by volume 5. Again, I didn't have access to a stick of butter, so the TA and our lab class improvised. We used a block of wood instead. The density of the block of wood was .914g/cm*3 and the volume of the block of wood (through water displacement) 165mL


 * Objects Name || Weight || Displacement mL || Density ||
 * 1.Small Marlbe || 3.6g || 1mL || 3.6g/cm*3 ||
 * 2. Medium Marble || 12.1g || 4mL || 3.025g/cm*3 ||
 * 3. Large Marble || 198.8g || 27mL || 7.36g/cm*3 ||
 * 4. Dice || 8.8g || 5mL || 1.76g/cm*3 ||

Conclusion: By analyzing my results from the two different methods that were used in calculating density, I would acknowledge that the displacement method is more accurate. I have arrived at this conclusion because the two results that were the most similiar was when I used the dice. The dice shows the most accuracy when compared to the three different sized marbles which were much harder to determine volume as compared to the ease of the dice. The fact that the marbles where difficult to determine the precise diamter, which then corralated to the volume throwing off my results in this experiment, while I did the displacement experiment with ease.

Displacement could work if 1 mL was not equal to 1cc. This is because an object would still be able to displace a specific amount of water that could be calculated

Their is about 240mL in 1 cup of butter Hypothesis: I think that the water level will not be affected because the displacement of the rock in the water should be canceled out by the loss of mass in the boat itself. Experiment: The water level remained the same because displacement levels remained the same (didn't have access to camera when completed experiment)
 * Boat Experiment**

The ice cubes that were clear had been boiled, and the ice cubes that were cloudy were just standard cubes made out of tap water. The fact that the boiling cube is clear is due to the fact of the oxygen that was released from the water when boiled. The cub that is cloudy is due to the presense of oxygen that was froze upon after being filled with tap water.
 * Ice Cube Experiment**
 * Cloudy Clear**