GIVING 50 POINTS AND BRAINLY PLS HURRY

2 answers:

8 0

I got a 100 with this, if this is the assignment you are talking about. Please try to change the wording so both of us don't get a 0 HEh

Explanation:

1. This experiment was to find how mass and speed effect KE. This is important because if you were in a situation where you needed something to go higher, you would know to add more or less of mass/speed.

To test mass, we filled the bean bag with a certain amount of water, then dropped it. After, you recorded how high it made the bean bag go. The same with speed, but same amount in the bottle, just dropped from different heights.

My hypothesis is when you have more mass, the KE will be greater. This is also the same with speed, if it is dropped from a higher place, the bean bag will launch farther than the last time.

2. Data I collected from the lab was like my hypothesis explained. When the height of the bottle increased, it made the bean bag go higher than the last. And I tested 4 different masses, 0.125 kg, 0.250kg, 0.375kg and 0.500kg. Each time the bean bag went higher on a larger mass.

A lot of times on the speed test, the bean bag would go higher than the bottle drop point, but not every time. Also, when it was dropped from the same height each time, some results varied quite a bit, like when it was dropped from 1.28 the results were 1.14 then 1.30 1.30. Mass on the other hand was all in the same number range, only once the numbers were a bit off from each other.

3. Some formulas I used were KE= ½ mv^2 and Ht v^2/2g. The first was to calculate the kinetic energy of an object, m=mass v=speed. Second was for finding out what height I needed to drop something to reach a certain speed, Ht=Height and g= Gravitational Acceleration of 9.8 m/s^2.

I used these to figure out tables that showed relationships between different things like mass and KE or speed and height. The whole time I was doing the lab, my data was going up, when there was more mass/speed there were higher values in the table.

This means that my hypothesis at the beginning was correct, more of m/s means KE will increase proportionally because they are all linear. I found it surprising when the bean bag height went over the water bottle drop mark.

4. To conclude, my hypothesis matched my data. The data values went up when more mass or speed was added. This means if I were in a situation where I needed more kinetic energy for something, I would know to increase mass or the speed of the object giving it energy.

The reason that this hypothesis is correct is when you have more mass, you have more energy. So, when you drop let's say a baseball, it isn’t that heavy so it would only launch the bean bag so far. But a bowling ball is very heavy and has lots of energy when falling because of that, it would make the bean bag go very high.

To make this experiment better, I would use a smoother material for the lever so energy wouldn’t be lost by friction from wood rubbing together. Also, maybe a scanner or video camera to more accurately record how far the bean bag went. All of these would help the lab get more precise results, maybe they could be used in a future lab.

zubka84 [21]3 years ago

8 0

Procedure:

1. Drag the empty jar to the lake to get a water sample

2. Fill two beakers with 600 ml water from the jar

3. Put the “1” and “2” labels on each beaker

4. Take the pH meter to Beaker 1 and record the pH and description in Table A

5. Take the pH meter to Beaker 2 and record the pH and description in Table B

6. Add 1 unit of each base (soap, alkaline batteries, baking soda) to Beaker 2 and record the pH and description in Table B and clear

7. Add 1 unit of each acid (lead acid batteries, pesticides, citric acid) to Beaker 2 and record the pH and description in Table B and clear

8. Add 3 units of each kind of base or acid (the “pollutants”) to Beaker 2 and record the pH and description in Table A.

9. Get a new beaker and label it with a “3” and put the filter on the beaker

10. Add the polluted water from Beaker 2 to the filter on Beaker 3 and record the pH and description in Table A

11. Drag the rain clouds from the tools to the lake model and observe what happens to the rainwater and groundwater and record observations on Table C

12. Drag a lake to the model and observe the effects on the groundwater and record your observations on Table C

13. Add 10 units of each pollutant to the lake

14. Observe the changes in the lake water and the groundwater and record your observation in Table C

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Explanation:

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