Answer;
Activation energy
Explanation;
Activation energy is the least possible amount of energy (minimum) which is required to start a reaction or the amount of energy available in a chemical system for a reaction to take place.
Catalysts can lower the activation energy and increase the reaction rate without being consumed in the reaction. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.
As the wave travels through different media, its speed and wavelength change, and its frequency remains constant.
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<span>Disadvantages:
One of the main disadvantages is the initial cost of the equipment used
to harness the suns energy. Solar energy technologies still remain a
costly alternative to the use of readily available fossil fuel
technologies. As the price of solar panels decreases, we are likely to
see an increase in the use of solar cells to generate electricity.
A solar energy installation requires a large area for the system to be
efficient in providing a source of electricity. This may be a
disadvantage in areas where space is short, or expensive (such as inner
cities).
Pollution can be a disadvantage to solar panels, as pollution can
degrade the efficiency of photovoltaic cells. Clouds also provide the
same effect, as they can reduce the energy of the suns rays. This
certain disadvantage is more of an issue with older solar components, as
newer designs integrate technologies to overcome the worst of these
effects.
Solar energy is only useful when the sun is shining. During the night,
your expensive solar equipment will be useless, however the use of solar
battery chargers can help to reduce the effects of this disadvantage.
The location of solar panels can affect performance, due to possible obstructions from the surrounding buildings or landscape.
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Answer:
Explanation:
Let assume the first connect have resistor R1 and R2
Then, this are connected in parallel
But, parallel connection of resistor have the same voltage.
So the power dissipated in each resistor is given as
P1=V²/R1
P2= V²/R2
If another resistor is added in parallel nothing change by the way each resistor dissipate power
Then, power dissipated in R3 is
P=V²/R3
Why we use parallel circuit at home
Parallel circuits are used in homes because the loads can be operated independently of each other.
Each load gets the full voltage of the circuit.