Weight Change of Coke Can When Opened: Explained

  • Context: High School 
  • Thread starter Thread starter Himal kharel
  • Start date Start date
  • Tags Tags
    Balance Weight
Click For Summary
SUMMARY

When a can of Coke is opened, the initial reading on a sensitive balance increases due to the force exerted by the liquid as it bursts out, resulting in a temporary increase in net force on the can. This is followed by a decrease in weight as the liquid exits and the mass of the can is reduced. Additionally, the escaping CO2 gas contributes to an increased downward force during the initial opening. Ultimately, the final weight is less than the original due to the loss of liquid and potential water evaporation.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Basic principles of fluid dynamics
  • Knowledge of gas behavior under pressure
  • Familiarity with the concept of mass and weight measurement
NEXT STEPS
  • Research Newton's second law of motion in relation to fluid dynamics
  • Explore the behavior of gases under pressure and its effects on liquids
  • Learn about the principles of mass loss in open systems
  • Investigate the effects of carbonation on liquid behavior when opened
USEFUL FOR

Physics students, educators, and anyone interested in the principles of fluid dynamics and gas behavior in everyday scenarios.

Himal kharel
Messages
79
Reaction score
0
when a can of coke placed in a sensitive balance is opened what happens to the reading?
the answer of this question is given first increases and decreases.
can anyone explain this?
 
Physics news on Phys.org
can coke opens and liquid bursts out of it with some acceleration which means: can applies force on liquid which means: liquid applies force on can::

so net force on can increase so does reading

now when the liquid is completely out the mass of can is reduced and so does reading
 
In a less dramatic scenario, the CO2 gas is escaping from the hole in the top and this pressure is causing an increase in downward force. Once the fizzing has stopped and there is less CO2 in there, the final weight will be less (and there may be some water evaporation too.
Should I be doing all this thinking for you? Is this a h/w question?
 

Similar threads

High School The Effect of Linear and Rotational Motion on Measured Weight
  • · Replies 10 ·
Replies
10
Views
1K
Undergrad Why does the weight of opened cold coke change over time?
  • · Replies 2 ·
Replies
2
Views
3K
Undergrad How Does Changing Mass and Spring Force Affect Watch Oscillators?
  • · Replies 11 ·
Replies
11
Views
2K
High School How Does Inclined Load Affect Weight Distribution When Moving a Cabinet?
  • · Replies 1 ·
Replies
1
Views
2K
High School What is the Correct Reading on the Scale in This Mass/Scale Puzzle?
  • · Replies 206 ·
7
Replies
206
Views
8K
High School Can an Hourglass on a Balance Scale Create Equilibrium?
  • · Replies 6 ·
Replies
6
Views
2K
High School Lever balancing physics (video game design)
  • · Replies 18 ·
Replies
18
Views
3K
High School Using energy principles to find equilibrium depth of floating object
  • · Replies 8 ·
Replies
8
Views
1K
Undergrad "Air Pressure" is not "the weight of the air above you"
  • · Replies 27 ·
Replies
27
Views
5K
High School What Is Mass and How Is It Defined in Physics?
  • · Replies 23 ·
Replies
23
Views
3K