To determine the composition of a substance based on its density 3. To determine the density of a substance by Archimedes Principle 2. Theory Relative Density (R. D. ) or also known as Specific gravity (S. G. ), is the radio of the density of a substance to the density of a given reference material. The object’s mass is weighed on the electronic balance and the volume of the specified object is determine by a graduated cylinder where the initial reading is accounted for and the final reading where the object was dropped in the cylinder.
Volume= If- Vi ; wherever is the Final reading or volume and Vi is the initial reading or volume in the cylinder. Density is described in this equation p- NV where M is the mass of the object and V is the Volume calculated from the readings The Bone density is used to determine if the has osteoporosis (2. 5 SD or more) or Estonian (1. 0 or 2. 5 SD). The Relative density (R. D) is determined by this equation . D. = Way-Www ; where Wa is the weight of the bone in mid- air and Www is the weight of the bone in water.
After this use R. D and multiply this to the density of water. Density of Bone (bone) = (R. D) x density of water. Legend: weight of the empty viscometer(WAP)weight of viscometer filled with water (Www)weight of viscometer filled with regular Coke Soda(WAR)weight of viscometer filled with diet Coke Soda (WAD)weight of viscometer filled with Coke zero Soda (WIZ) The last activity is where we determine the R. D of a regular Coke, a diet Coke and a Coke zero soda can. R. D of regular Coke= WAR-WAP- WAP. D of diet Coke- WAD-WAP- WAP.
D of Coke Zero- WIZ-WAP- WPAD the results were recorded and calculated, make the generalizations and determine which of the 3 types of Coke soda has less sugar that resides inside each. . Methodology The materials used for the experiment on Relative Density are a spring scale, beaker, a small alloy, a bone, a viscometer, and Regular Coke, Coke Light, and Coke Zero. In the first activity, the alloy was weighed using an electronic gram balance. Meanwhile, water was placed in the beaker, and its initial level was noted. The alloy was then placed in the beaker, and the new water level was noted.
From the difference of the final water level and initial water level, the volume of the alloy was deduced. The density of the alloy was then deduced from its weight ND volume using the formula for density = mass/volume. The second activity was focused on the density of a bone. The bone given was weighed using a spring balance, and it weight was recorded as WA. A piece of thread was tied to the bone, which was then immersed in a beaker of water. The weight of the bone in water was measured using a spring balance, and was recorded as WEB. The relative density of the bone was computed using the formula: R.
D. = WA/WA – WEB. Afterwards, the density of the bone was computed using the formula: density = R. D. X Density of Water. The finding of the bone, whether it is osteoporosis, osteopathic, normal, or osteoporosis, was determined using the value of the computed bone density. In the third and last activity, the densities of the different kinds of soft drinks were computed. The weights of the empty viscometer (WAP), with water (WWW), with regular Coke (WAR), with Coke Light (WALL), and Coke Zero (WIZ) were first measured using the electronic gram balance.
Afterwards, the relative density of regular Coke was solved using the formula: R. D. WAP= (WAR – WAP)/(WWW – WAP). The same was done for the Coke Light and Coke Zero, by replacing the WAR in the formula with WALL and WIZ, respectively. . Results and Discussion Table 4. 1 Activity 1 Weight of the coins (g) 16. Egg Initial level of water (c) mall Final level of water (c) mall Volume of coins (c) ml Density of coins (g/c) 1. Egg/c The first activity was done to know the density of an alloy. The weights was weighed first using an electronic balance and was attached to a thread.
After getting the initial level of the water, the weights was then lowered into the water and the final volume was also recorded. By subtracting the final volume of the water to its initial volume, the volume of the coins was computed. Since the final illume of water after displacement is mall while its initial volume is mall, the volume of the coins is ml. The density, which is 1. 659 g/c, was computed by dividing the mass over the volume. The percentage composition of steel in the object was then computed using the density.
The results showed that the weights were 65. 9% steel. Table 4. 2 Activity 2 Weight of bone in air (g) egg Weight of bone in water (g) egg Relative density of bone 1. 5 Density of bone (g/c) 1. G/c Finding Estonian In the second activity, we used a spring balance to know the weight of the bone in air and in water. Our results showed that the bone is lighter in water since it weighs egg in air and egg only in water. After weighing the bone, the Relative Density was computed. The computed Relative Density is 1. G/c.
The actual density, which is computed by multiplying the relative density by the density of water, is also 1. 55 g/c. Our findings showed that the bone has Estonian which means that its mineral bone density is lower than normal. Table 4. 3 Activity 3 Weight of empty viscometer (g) 20. Egg Wet. Of viscometer filled with water (g) 44. Egg Wet. Of viscometer filled with regular soft drink (g) 45. Go Wet. Of viscometer filled with diet soft drink (g) 44. Egg Wet. Of viscometer filled with Coke Zero 44. Egg Relative Density of regular soft drink 1. 021 Density of regular soft drink (g/c) 1. 2 leg/c Relative Density of Coke Light 0. 982 Density of Coke Light (g/c) 0. Egg/c Relative Density of coke zero 0. 981 Density of Coke Zero (g/c) 0. Egg/c The third activity is also similar to the second activity because its aim is to find the density of three kinds of cola. The results gathered showed a density of 1. 021 g/c for regular coke, 0. 982 g/c for diet coke and 0. 81 g/c for coke zero. It can be clearly seen that the regular coke is a lot denser compared to the other two. The diet coke is also denser compare to coke zero by . Egg/c.
It can be safely inferred that when the three cans with the different kinds of cola was placed in a container with water, the diet coke and the coke zero floats while the regular coke sinks. 5. Conclusion There are different methods wherein the density of an object could be determined. One of them is by using the displacement method. In this method, the change in volume of the water when the object was submerged indicates the illume of the solid. Given the mass of the object after weighing the object with the gram balance, it is possible to compute for its density, using the formula; mass over volume.
Another method of determining the density of an object is by using the Archimedes principle. This method indicates that the upward buoyant force equals to the weight of the fluid that the body displaces. The force is applied on an object that is partially or fully submerged in a liquid or fluid. We also can determine the composition of a substance based on its density, which is shown in activity 2. In this activity, the density of the bone would indicate if the bone is considered as having a low bone mass or otherwise. 6. Applications How can you distinguish “Fool’s Gold” from pure gold?
Pure gold is quite soft and that if you bite it there will be teeth marks on it but biting on it is bad fir the teeth and fool’s gold is really hard and can damage your teeth. Also, fool’s gold when being burned by the Bunsen burner turns black, smoke and will smell like rotten eggs. In relation to this experiment, Density is used to determine which is real of fake. Real gold is very heavy and will sink to he bottom while fool’s gold is very light and will just float on water. The solid samples used in the experiment are denser than water.
How will you determine the density of a solid that is less dense than water? Explain the formula you will use. One way to determine the density is by using the displacement method. In order to get density we get the Density which is p= VIVE. By Archimedes principle, object that is less dense that water will float on the surface. The suitability of a person to donate blood may be tested by placing a drop of blood in a saline solution of density 1. 03 g/c. Is he a suitable donor if the drop of blood sinks? Explain your answer. The heavier the substance or object is the more amount is residing inside of it. Alien solution per millimeter is always lighter than blood since it contains no blood cell, so blood will always sink. It is heavy because of the plasma that resides within the blood What is the meaning of the expression “tip of the iceberg”? Is there a physical basis for this? The density of ice is 0. 9167 g/CM. The density of salt water is 1. 025 g/CM 1. 025 g/CM. 9167 g/CM = 89. 4% – About 90 percent of the ice is underwater and it cannot be seen by sailors which an be very dangerous for sailors traversing through the sea.