1). an electric motor running
Electrical energy is changing into kinetic energy and a little bit of heat
2). light a match
The chemical energy stored in the match head changes into light and heat energy.
3). a light bulb
Electrical energy is changed into light and heat energy.
A mechanical wave can only travel through matter.
b) accelerate to the left as much more pressure is pulling it in that direction and on the right however , there is less force .
Answer:
The value is 
Explanation:
From the question we are told that
The voltage is 
The current is 
Generally the resistance value is mathematically represented as
=> 
=>
Answer:
r = √(k q₁ q₂ / F)
Explanation:
F = k q₁ q₂ / r²
Multiply both sides by r²:
F r² = k q₁ q₂
Divide both sides by F:
r² = k q₁ q₂ / F
Take the square root of both sides:
r = √(k q₁ q₂ / F)
