A. red, is the correct answer. A red filter only lets red light through, whether white or red light passes through it.
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Answer:
Option B. N2(g) + 3H2(g) → 2NH3(g)
Explanation:
When nitrogen react with hydrogen, they form a product as shown below:
N2+ H2 → NH3
We need to balance the equation. This is illustrated below:
There are 2 atoms of nitrogen on the left side and 1 atom on the right side. To balance it, put 2 in front of NH3 as shown below:
N2+ H2 → 2NH3
Now, There are a total of 6 atoms of Hydrogen on the right side and 2 atoms on the left side side. This can be balanced by putting 3 in front of H2 as shown below:
N2+ 3H2 → 2NH3
Now we see clearly that the equation is balanced as we have equal numbers of atoms of N and H on both sides of the equation
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:A
Explanation:
The crust Of The earth's has plates boundaries,when the layers that forms to boundaries glide on each other, vibrations occur which are known as earthquakes
