A stack of 15 pennies is immersed into a 100 mL graduate initially containing 20.6 mL of water. The volume in the graduate cylinder increases to 26.0 after the pennies are added. Calculate the volume in mL of the stack of 15 pennies.

5.4

To calculate the volume of the stack of 15 pennies, we need to find the difference in volume before and after the pennies were added.

Step 1: Calculate the initial volume of water.
Initial volume of water = 20.6 mL

Step 2: Calculate the final volume after the pennies were added.
Final volume = 26.0 mL

Step 3: Calculate the volume of the stack of 15 pennies.
Volume of stack of 15 pennies = Final volume - Initial volume
Volume of stack of 15 pennies = 26.0 mL - 20.6 mL
Volume of stack of 15 pennies = 5.4 mL

Therefore, the volume of the stack of 15 pennies is 5.4 mL.

To calculate the volume of the stack of pennies, we need to find the difference between the initial volume of water in the graduate cylinder (20.6 mL) and the final volume of water after the pennies are added (26.0 mL).

The volume of the stack of pennies can be determined by subtracting the initial volume of water from the final volume:

Volume of stack of pennies = Final volume - Initial volume
Volume of stack of pennies = 26.0 mL - 20.6 mL

To find the difference between these two volumes, subtract the initial volume from the final volume.

Volume of stack of pennies = 5.4 mL

Therefore, the volume of the stack of 15 pennies is 5.4 mL.

The Law of Impenetrability says that two objects can't occupy the same space at the same time; therefore, the pennies and the water can't occupy the same space at the same time. Without the pennies the water level read 20.6 mL, dropping in the pennies gives a level of 26.0. Shouldn't it be obvious that the volume of the pennies is 26.0-20.6 = ? mL.