Where does the energy come from?

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In summary, a helium balloon gains kinetic energy and gravitational potential energy as it rises into the sky due to the buoyant force acting on it. The lighter helium is able to float in the denser air, causing the balloon to rise with some velocity. This rising motion also results in an increase in potential energy as the balloon moves through the gravitational field.
  • #1
Omid
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When a helium balloon soars into the sky, it gains KE and gravitational PE. where does that energy come from?
 
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  • #2
Best answer I can think of is that the balloon is being acted on by a buoyant force. Helium is less dense than air, and so the average density of the balloon is less than that of air. The balloon therefore "floats" in this sea of air called the atmosphere, and the buoyant force causes it to rise. Any corrections/clarifications?
 
  • #3
The lighter helium is bouyant in the denser air - the bouyant forces cause the helium balloon to rise with some velocity. Kinetic energy is simply 1/2 mv2.

The balloon is rising in the gravitational field, hence the mass of the balloon is gaining potential energy.
 
  • #4
Thank you very much.
 

1. Where does the energy come from?

Energy comes from various sources such as sunlight, fossil fuels, nuclear reactions, and renewable sources like wind and water.

2. How is energy created?

Energy is not created, it is simply converted from one form to another. For example, the sun's energy is created through nuclear fusion, while fossil fuels are formed from organic matter that has undergone heat and pressure over millions of years.

3. What is the role of energy in our daily lives?

Energy plays a crucial role in our daily lives as it powers our homes, transportation, and industries. It also enables us to perform various tasks such as cooking, communicating, and staying connected through technology.

4. Can we run out of energy?

While energy sources like fossil fuels are finite, renewable sources like sunlight and wind are constantly replenished. However, it is important to use energy efficiently and transition to sustainable sources to avoid depleting finite resources and damaging the environment.

5. How can we reduce our energy consumption?

There are various ways to reduce energy consumption, such as investing in energy-efficient appliances, turning off lights and electronics when not in use, using public transportation or carpooling, and switching to renewable energy sources. Small changes in our daily habits can make a big impact on reducing energy consumption.

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