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Why does the flow of matter in an ecosystem stay constant over time?
The flow of matter in an ecosystem stays constant over time due to the principle of conservation of matter, which states that matter cannot be created or destroyed, only transformed. This means that the total amount of matter within an ecosystem remains relatively constant as it cycles through various biotic and abiotic components.
What is true about the speed of molecules in a sample of gas held at a constant temperature?
At a constant temperature, the average kinetic energy of the molecules in a gas sample remains constant. This means that while individual molecules may move at various speeds, the average speed is directly related to the temperature. As temperature increases, the average speed of the molecules also increases, and vice versa. However, at a constant temperature, the distribution of speeds can vary, but the average kinetic energy will stay the same.
What are the physical properties of an object at rest?
An object at rest has zero velocity and acceleration. Its position remains constant and it exerts no force on other objects. The object's energy is typically in the form of potential energy.
Why do motors heat and then stay at a constant temperature?
Motors heat up due to electrical resistance, friction, and inefficiencies in the conversion of electrical energy to mechanical energy. Once a motor reaches its operating temperature, the heat produced is balanced by heat dissipation to the surrounding environment, resulting in a constant temperature. This balance is crucial for the motor to maintain optimal performance and prevent overheating.
What happens to the temperature if you add a mole of gas?
If you add a mole of gas to a closed system at constant volume, the temperature will increase if the pressure remains constant due to the increase in internal energy of the system. If the volume is allowed to expand and the pressure is constant, the temperature may stay the same or decrease, depending on the conditions of the system.
Does the total amount of energy in the world stay constant?
Yes, according to the law of conservation of energy, the total amount of energy in a closed system remains constant. Energy cannot be created or destroyed, only transferred or transformed from one form to another.
Why does the total amount of energy stay the same during an energy transfer?
The total amount of energy stays the same during an energy transfer because of the law of conservation of energy, which states that energy cannot be created or destroyed, only transferred or converted from one form to another. This means that the total energy in a closed system remains constant.
What stays the same no matter where it is located?
The basic properties of matter, such as mass and energy, stay the same no matter where they are located in the universe. These fundamental characteristics remain constant regardless of an object's position in space or time.
True or false energy balance states that body mass stay constant when calories intake equals energy expenditure?
you pick.
How does the principle of conservation of energy and momentum apply to the dynamics of a closed system?
The principle of conservation of energy and momentum states that in a closed system, the total amount of energy and momentum remains constant. This means that energy and momentum can change forms within the system, but the total amount will always stay the same. This principle is important in understanding how energy and momentum are transferred and distributed within a closed system during dynamic interactions.
Is conservation of energy true to every inertial frame?
Yes, this is a very general law. However, this doesn't mean the energy is invariant under change in reference frame. Each frame assigns a different energy to the system, but if you stay in that frame, the energy will stay constant.
What happens to mass and energy in closed system?
In reality closed systems do not exist. In the theoretical case of a closed system the total energy of the system would stay the same (matter and particles are considered energy to). More important: the energy level throughout the whole system will eventually be evenly spread and uniform (entropy), therefore no energy differential is left to perform work.
Principle of conservation of mechanical energy?
If you know the kinetic and potential energies that act on an object then you can calculate the mechanical energy of the object. States that in an isolated system the mechanic energy is constant.
Does the suns energy output stay constant over time?
No, the sun's energy output does not stay constant over time. The sun goes through cycles that can affect its energy output, such as the solar cycle which lasts roughly 11 years and can cause fluctuations in solar activity and energy output. Additionally, the sun will gradually increase in luminosity over billions of years as it ages.
When heating wax why does the temperature stay fairly constant?
When there is a change of state occuring (in this case from solid to liquid), temperature will remain constant. Energy is absorbed to weaken the intermolecular forces between the wax particles.
Why must a force be exerted in an object ti change its velocity?
We know that that is the way our Universe works; WHY the Universe was designed that way, or why it happens to be that way, is normally not known.In this case, with a different law for velocity, lots of the physics we know would be drastically different - for example, conservation of energy, conservation of momentum, and conservation of angular momentum could all be violated.
When energy transfers from one object to another can the energy stay the same?
The total energy has to stay the same. It is not possible to create or destroy energy, even if you transform it from one form to another.On the other hand, by the Second Law of Thermodynamics, the useful or usable energy will invariably be reduced in any energy transformation.
