Question

Activity 1 Spotting errors

Finding density of an irregularly shaped object\

Calculating acceleration due to gravity using a simple pendelum

Using ball in a table to compare free tall and projectile motion

Possible random error/ Possible systematic error

Answer 1

Answer:

possible random error........

Explanation:

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Answer 2

We can take a simple experimental method to test the density of any object (regular/irregular solid or Liquid)

Explanation:

Aim To measure the density of liquids and solids.

Method

Method 1: A regularly shaped object

1. Measure the object's length (l), width (w), and height (h) with a ruler.
2. Measure the mass of the item on the top pan balance.
3. Calculate the cube's volume using ().
4. Calculate the object's density using the data.

Method 2: An irregular shaped object

1. Measure the mass of the item on the top pan balance.
2. Fill a measuring cylinder with enough water to completely cover the object when it is placed inside. Take a look at the volume's reading.
3. Lower the thing into the cylinder with care.
4. Take a fresh look at the book. To get the volume of the item, subtract the initial reading.
5. Calculate the stone's density using the data.

Method 3: A liquid

1. Measure the mass of the measuring cylinder on the top pan balance.
2. Fill the measuring cylinder with 30 cm3 of liquid (e.g. water) and record the new mass.
3. Subtract the first mass from the second mass. The mass of 30 cm3 of water is this.
4. Calculate the density of the water using the data.

Evaluation

• Regular solids, irregular solids, and liquids may all have their density tested.
• The experimental error can affect densities derived from measurements.
• This might be because the top pan balances used by different persons may not be equally calibrated;
• the resolution of the measuring cylinders may differ,
• resulting in various volume values being recorded; or the top pan balances used by different people may not be identically calibrated.