An empty parallel plate capacitor is connected between the terminals of a 16.7-v battery and charges up. the capacitor is then d
1 answer:
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Answer:
(a) Energy density will be equal to
(b) Total energy will be equal to 0.0718 J
Explanation:
It is given that length of solenoid l = 78.8 cm = 0.788 m
Cross sectional area
Number of turns of the wire N = 914
Current in the solenoid i = 8.25 A
Inductance of the wire is equal to
(b) Total energy stored in magnetic field
(a) Energy density will be equal to
Answer:
Average speed: 0.5 m/s. Average velocity: 0
Explanation:
Average speed is given by:
where
d is the total distance covered (the length, of one lap of the track, so d = 400 m)
t is the time taken to cover that distance (so, t = 800 s)
Substituting,
Instead, average velocity is defined as
where this time,
d is the displacement, which is the vector connecting the starting point to the final point of the motion
t is still the time taken (800 s)
However, in this case the walker starts and finishes his trip at the same point: therefore, the displacement is zero (d=0), and this means that the average velocity is zero as well.