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salantis [7]
3 years ago
5

PLEASE HELP!!

Physics
1 answer:
irga5000 [103]3 years ago
8 0
You use energy from your body and press the pedals on the bike that has chains and the chains are connected to a circular ish shape and is also connected to the wheel and it spins
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Write down 2 differences between electrical conductors and electrical insulators.
serious [3.7K]

Answer:

electrical conductors help electric current to pass through it

electrical conductors are usually made of any metal

electrical insulator don't help electric current to pass through it

electrical insulators are made of non metals

hope it helped you

3 0
2 years ago
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What happens to particle spacing when temperature increase, What we call this process?
Slav-nsk [51]

Answer:

The atoms start vibrating really fast, making the space between them larger. It's an increase in Kinetic Energy.

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3 years ago
A circuit has a resistance of 4.0 Ohms. What voltage will produce a current of 1.4 Amps in the circuit
enyata [817]

Answer:

5.6 volts

Explanation:

According to Ohm's Law, V = IR

where V = voltage, I = Current and R = resistance

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3 years ago
What does a chemical equation describe ?
satela [25.4K]
A chemical equation is the symbolic representation of a chemical reaction in the form of symbols and formulae.
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3 years ago
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The pH of pure water at 25°C is 7.0. The enthalpy change of the autoionization of water is +55.89 kJ/mol. What is the pH of pure
Sergeu [11.5K]

Answer:

6.14

Explanation:

If the pH falls as temperature increases, this does not mean that water becomes more acidic at higher temperatures. A solution is acidic if there is an excess of hydrogen ions over hydroxide ions (i.e., pH < pOH). In the case of pure water, there are always the same concentration of hydrogen ions and hydroxide ions and hence, the water is still neutral (pH = pOH) - even if its pH changes.

The problem is that we are all familiar with 7 being the pH of pure water, that anything else feels really strange. Remember that to calculate the neutral value of pH from  Kw . If that changes, then the neutral value for pH changes as well. At 100°C, the pH of pure water is 6.14, which is "neutral" on the pH scale at this higher temperature. A solution with a pH of 7 at this temperature is slightly alkaline because its pH is a bit higher than the neutral value of 6.14.

4 0
3 years ago
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