Answer: The answer is The leftover electrical energy is transferred into heat energy.
Explaination: I took the test
The LED lightbulb converts 89% of the electrical energy it consumes into light. The leftover 11% of the electrical energy is predominantly converted into heat energy.
An LED lightbulb having an energy efficiency of 89% indicates that 89% of the electrical energy it consumes is converted directly into light. The remaining 11% does not disappear or get destroyed but is transformed into a different type of energy. According to the law of conservation of energy, energy cannot be created or destroyed; it can only be converted from one form to another. In this case, the remaining 11% of electrical energy is mostly converted into heat energy. Hence, the LED lightbulb gets hot when in use.
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b. activation energy.
c. catalyst energy.
d. chemical energy.
Activation energy is the energy needed to start a chemical reaction. The correct answer to the given question is option b. activation energy.
The energy needed to get a reaction started is called the activation energy. It is the minimum amount of energy required for a chemical reaction to occur. Activation energy is needed to break the existing bonds in reactant molecules and form new bonds to produce product molecules.
The correct answer to the given question is option b. activation energy.
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To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, Much of the mass of an atom is concentrated in its nucleus. The nucleus contains protons and neutrons and the outer part of the atom contains electrons.
Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit. Electron has -1 charge while proton has +1 charge. Neutron is neutral.
Much of the mass of an atom is concentrated in its nucleus. The nucleus contains protons and neutrons and the outer part of the atom contains electrons.
Therefore, much of the mass of an atom is concentrated in its nucleus. The nucleus contains protons and neutrons and the outer part of the atom contains electrons.
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Answer: 1) The answer is: c) protons and neutrons.
2) The answer is: a) electrons.
Explanation:
Example 1:
Type of Change:
Evidence:
Answer:
Example 1. One change I observed was when cooking, I needed to boil water. The water was later evaporated due to the increase of heat from the stove below the pot. Heat traveled and transferred from the stove to the pot then the water. This change is from liquid to gas.
Example 2. I was mixing sugar into my tea, the sugar dissolved into the tea. This is an example of dissolving a solid into a liquid. The tea took the properties of the sugar and turned the drink sweet.
Extra, taking a hot shower and steam leaves the shower. This change is of evaporation.
Explanation:
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B. Chemical change
The length measurement in kilometers will be -
92.25 x 10⁻³ Kilometers.
We have length measurement of 92.25 m.
We have to determine the number of kilometers in this much length.
In 1 km there are 1000m
According to the question -
Length measurement = L = 1 meter
In kilometers, the length will be = 1 /1000 x 92.25 =
92.25 x 10⁻³ Kilometers.
Therefore, the length measurement in kilometers will be -
92.25 x 10⁻³ Kilometers.
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2) One mole of gas occupies a volume of one liter.
3) Pressure is 1.0 atmosphere.
4) Volume is 2.4 liters