The basic relationship between voltage, resistance and current of an electrical device is given by Ohm's law:
where
V is the voltage
I is the current
R is the resistance
The hot plate in our problem is connected to a source of V=120 V and it has a resistance of
, therefore we can rearrange the previous equation to calculate the current through the device:
Answer:
sound is the answer, I'm not sure why I'd think it was because it creates a vacuum
Answer: B
Explanation:
1) Apply Ampere's Law to the loop
The loop has a circumference of 2pir.
The current enclosed is multiplied by N because there is N distinct loops.
Answer is B
Answer:
Explanation:
log10 function is required to convert dB into intensity of a sound. Both are measures of loudness of a sound and the relationship can be expressed as follows:
dB = 10 log10(I/Io), where Io is 10^-12 W/m^2
Substituting, 82 = 10 log10(I/10^-12)
I = 0.0001585 W/m^2
or 1.58*10^-4 W/m^2
Answer:
hope it helps..
Explanation:
Moment of force about a given axis= Force x perpendicular distance of force from the axis of rotation.