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Q: Does 1L of water at 65 F have more or less or the same energy as 1L of water at 65 C?
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Is the energy generated from falling water in a hydroelectric plant the same more or less than falling water?

It's less. There are "resistance" losses in any system, so not all the energy of the falling water can be changed into electric power. Certainly we can't get more energy out than is put in. Perpetual motion isn't an option here.


Is temperature the same as heat energy?

temperature is a way to measure heat, so they are not exactly the same Note, a cup of water at the same temperature as a gallon of water ... has less energy.


Why do you need to become efficient?

because that means less energy is used. if something is more efficient than something else it is so because it can either use less energy to do the same thing or the same amount of energy to do more


Does one liter of water at 50 degrees celsius have more less or the same kinetic energy as 2 liters of water at 50 degrees Celsius?

The two liters of water would have more kinetic energy than the one liter of water at the same temperature because there is more water molecules moving around in the larger volume. Temperature is a measure of the average kinetic energy of the molecules; therefore, more molecules in the larger volume contribute to higher total kinetic energy.


Does 4 cups of boiling water have the same thermal energy as 2 cups of boiling water?

No, 4 cups of boiling water would have more thermal energy than 2 cups of boiling water. The amount of thermal energy is directly related to the quantity of water and its temperature. More water requires more energy to heat it to boiling temperature, resulting in higher thermal energy.


Does sound travel under water faster than in air?

Sound should travel with less energy loss underwater as water has a more tightly packed particles than air and so can travel between the particles with less energy loss than in air but its speed is the same.


Why does melting ice require much less energy than boiling the same mass of water?

Melting ice requires less energy than boiling water because the energy is only needed to break the bonds between the water molecules in the solid ice state. In contrast, boiling water requires more energy because it needs to overcome intermolecular forces to change the liquid water into vapor, which involves breaking all the bonds between water molecules.


Does steam have more energy than water?

No. Assuming you have the same mass of each steam has more energy than hot water, because water needs to gain energy in order to evaporate.


Does salt water around the world have the same density?

No, it depends on the volume of water that can dissolve the salt. If the volume of water is more then it dissolves more salt and the density will be more and if the volume of the water is less then it dissolves less salt and the density will be less.


How might the potential energy of water in a dam be increased?

By filling the dam with more water, because by doing that it gains more gravitational potential energy which is the same as potential energy.


If a bathtub and a cup contain water at the same temperature which will have more thermal energy?

The bathtub will have more thermal energy because it contains more water, which means more molecules with kinetic energy. The thermal energy of an object is directly proportional to its mass and temperature.


Why the water at the bottom of a pot of simmering water becomes less dense as it is heated?

As water, or any substance, absorbs heat energy, its molecules gain kinetic energy. Because they are moving around more, they take up more space. Density is the measure of how much stuff is in a given space. More space and same amount of stuff equals lower density.