The transfer of thermal energy as heat requires a difference in temperature between the two points of transfer. Heat may be transferred by means of conduction, convection, or radiation. Conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object.
Heat transfer between two objects ends when they reach the same temperature or thermal equilibrium. This process is guided by the second law of thermodynamics and can be observed via changes in temperature. Once no net heat transfer occurs over time, a state of thermal equilibrium is reached.
The transfer of heat, or thermal energy, between two objects ends when those objects reach the same temperature, a state known as thermal equilibrium. This process is guided by the second law of thermodynamics, which indicates that heat will naturally transfer from a hotter object to a cooler one. For instance, if you put ice into a hot drink, heat transfers from the warmer drink to the colder ice until they both reach the same temperature. Furthermore, the internal energy of a system, which includes its thermal energy, is directly proportional to its temperature. Hence, observing the temperature change can provide an indication of when heat transfer has ceased.
However, it's important to note that the absence of a temperature difference doesn't mean energy isn't there; it just isn't available for work because no more heat transfer can occur without a temperature difference. This provides a fundamental characterization of a thermodynamic system and exemplifies that observation of no net heat transfer over time indicates a state of thermal equilibrium.
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2.01 kg, 2.02 kg, 1.99 kg, 1.97 kg
Which answer choice BEST describes these measurements?
A. accurate and precise
B. inaccurate and precise
C. accurate and imprecise
D. inaccurate and imprecise
Answer:
inaccurate and precise
Explanation:
The apparent brightness of a star depends on how bright it really IS, and also on its distance from Earth. Just like matches, flashlights, and fireflies, stars that are closer to us look brighter to us. (Think about the Sun.)
Sound is an illustration of a compressionalwave. Mechanical waves like sound waves need a medium to travel through, such air, water, or solids.
A sound wave undergoes compressions and rarefactions as it passes through a medium.
Particles in the medium move parallel to the wave's propagation direction during a compressional wave.
When particles are close to one another, compression regions arise in the case of sound waves, creating high-pressure zones.
Following these compressed zones are rarefactions, when the particles are dispersed and low-pressure areas develop.
Thus, sound is an example of a compressional wave.
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Answer:
The wave front expanding out from an explosion is possibly the most dynamic example of a compressional wave. And a pulse of compressed air can transfer a LOT of energy. ... For a literal "compression wave" visualize accelerating a boat across the water, compressing the water it encounters into a "bow wave".
Answer:
the most important thing to do is STUDY and practice, practice, practice. dont give up
Explanation: