Physics, 27.04.2021 16:00, gatchatuberfantasy
1. If a system is isolated, the total energy within that system is constant. Consider the case of a hot cup of coffee: when it cools down, the energy goes into the surrounding air, causing the air to warm. If the coffee and the air are placed in an isolated chamber, the total energy of the system (coffee + air) is constant because the energy lost by the coffee is exactly equal to the energy gained by the air.
The only way for the total energy of a system to change is when it is not isolated, meaning that external forces or sources of energy interact with the system. If we want to define a system where the total energy is conserved, which one of the choices below would be the best system to consider?
A. The person
B. The person and the Earth
C. The Earth
2. Based on your answer to Question 1, why doesn’t the total energy of the Earth-person system change when the person goes up to a new height, gaining potential energy?
Answers: 1
Physics, 22.06.2019 07:50, babbybronx
Imagine you are standing in the antarctic during the southern hemisphere summer. the sky is clear and blue. there are no clouds in the sky. your shadow is cast on the icy ground. what is the color of the shadow?
Answers: 1
Physics, 22.06.2019 21:30, hail47
Global climatic patterns are changing because of the melting of polar ice caps. the melting of polar ice caps is an example of the interaction between the atmosphere and cryosphere cryosphere and geosphere hydrosphere and geosphere biosphere and cryosphere
Answers: 1
Physics, 22.06.2019 22:50, bigbrogamer
Which of the following statements correctly describes a transformer?
Answers: 3
1. If a system is isolated, the total energy within that system is constant. Consider the case of a...
Mathematics, 21.05.2021 16:00
Spanish, 21.05.2021 16:00
Mathematics, 21.05.2021 16:00
Mathematics, 21.05.2021 16:00
Social Studies, 21.05.2021 16:00
Mathematics, 21.05.2021 16:00
Biology, 21.05.2021 16:00