Answer:
Rusting of irons
Change in molecular composition
irreversible change
Explanation:
chemical change Is an irreversible change so we will only observe permanent change
EPE= 0.5 * spring constant * (extension)^2
Spring constant=EPE/0.5*extension^2
5J/0.5*0.5^2
=40N/m
You've built quite a convoluted question there, Thelo.
If you wrote what you mean and I read it correctly, then the phrase
in the blank is "... the loss of energy to friction in the machine ...".
A) a piece of wire
Explanation:
Radhika's mother is simply replacing piece of wire.
A fuse is made up of a thin strip of wire that melts when there is an over current.
- A fuse is electrical safety device in circuit that protects appliances from over current.
- The wire in a fuse has a high resistance and low melting point.
- When current is high, the resistance of the wire causes it to melt and break the circuit.
- In this way, appliances are protected from the harmful effect of the surge in voltage.
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