Answer:
length of column is 140.42 m
Explanation:
in 1 min the soldiers travels 114 steps
so to complete 1 step the time taken by the soldiers =
t = 
t = 
t = 0.526 s
speed of sound = 343 m/s
length of the column = v × t
= 343 m/s × 0.526 s
= 140.42 m
hence the length of column is 140.42 m
Answer:
correct answer is objects that are good absorbers of radiation are good reflectors as well
Explanation:
This is a contradiction because good absorbers are poor reflectors. For example if you have a mirror which have shiny surface then it can reflect the radiation in a well manner but it is not a good absorber.
other options are true.
They pick up broadcast signals, amplify them, then send them out.
This is needed due to the radio waves traveling in a ripple pattern; they degrade over time.
I believe Uranium it is U in the table
Answer:
C) Inversely to its volume
Explanation:
As the volume decreases (Container gets smaller) the pressure increases. Conversely, If the volume increases (Container gets larger) the pressure decreases.
