The outer shell electrons in metals are not tightly bound to the nuclei of their atoms they are free to roam throughout the mate
rial moving from atom to atom these materials are good
1 answer:
The pumps which supplies energy to move the water from the ground to a high elevation. The charges that flow throughout the wires.
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Longitudinal wave hope this is right :))))))))))
Answer:
A) The wave that travels through the rail reaches the microphone first.
B) separation in time between the arrivals of the two pulses is 0.01539 seconds.
Explanation:
Detailed explanation and calculation is shown in the image below
Initial velocity (u) = 90km/hr = 90/3.6 m/s = 25m/s
final velocity (v) = 18km/hr = 18/3.6 m/s = 5m/s
acceleration = (v-u)/t = (5-25)/4 = -5 m/s2
change in momentum = m(v-u) = 1200(5-25) = -24000 kg•m/s
F = ma = 1200 x -5 = -6000 N
It's a plain, not a lever