Answer:
44.1 m
Explanation:
<u>Given:</u>
- = speed of sound in air = 343 m/s
- = speed of sound in the rod =
- = times interval between the hearing the sound twice = 0.12 s
<u>Assumptions:</u>
- = length of the rod
- = time taken by the sound to travel through the rod
- = time taken by the sound to travel to through air to the same point =
We know that the distance traveled by the sound in a particular medium is equal to the product of the speed of sound in that medium and the time taken.
For traveling sound through the rod, we have
..........eqn(1)
For traveling sound through the air to the women ear for traveling the same distance, we have
Hence, the length of the rod is 44.1 m.
Answer:
W = 1.545E6 J total work
P = W / t = 1.545E6 J / 3 sec = 5.15E5 J/sec = 515,000 J/sec (Watts)
Using definition of power
MA = (Effort Distance)/(Effort Resistance) = L/H
L = MA * H = 5 * 8" = 40"
Answer:
Apply lubrication. You can use spray-dry lubricant, which is the preferred method, or wax. Simply rubbing a candle on the runners should be enough to get things working smoothly again. If you don't have a lubricant or a candle, tape can also get the job done.
Explanation:
Sorry, I most likely did this wrong; but hopefully I didn't!
HgO2
Na+H2CI
K2CI2
C2H6O2--> H2CO2
C5H12O2--> H2CO3