The parking brake on a 1000 kg Cadillac has failed, and it is rolling slowly, at 1 mph , toward a group of small children. Seein
1 answer:
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The stereo uses an energy of 
in a time 
, therefore the power of the stereo is given by
We also know that the power of an electrical device is related to its voltage, V, and its resistance, R, by the following equation
therefore, we can rearrange the equation to calculate the resistance of the stereo:
We also know that the power of an electrical device is related to its voltage, V, and its resistance, R, by the following equation
therefore, we can rearrange the equation to calculate the resistance of the stereo:
Answer:
Explanation:
If there is a dielectric slab with thickness less than the distance between the plates is inserted inside a capacitor, then that capacitor can be regarded as two capacitors connected in series.
Let's assume that the slab is placed onto the lower side. So, the capacitance of that part of the capacitor, C1 is
where is the permittivity of the slab.
The other part of the capacitor is
Two capacitors are connected in series:
If we know the charge of the plates, we could relate the potential V0 to capacitance via