Answer:
a
b
Explanation:
From the question we are told that
The wavelength is 
The energy is 
This energy is mathematically represented as
Where c is the speed of light with a value 
h is the Planck's constant with the value 
n is the number of pulses
So
substituting values
Given that the pulses where emitted 20 times in one second then the period of the pulse is
Hence the average power of photons in one 80-mJ pulse during 1 s is mathematically represented as
substituting values
Answer:
N3+3H2----->3NH2
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The answer is X. I hope this helped
Answer:
t = S / V where S is distance sound travels and V the speed of sound
S = 20 + 20 - v t where v is speed of bat and t time to hear echo
S = 40 - v t
t = (40 - S) / v = (40 - V t) / v substituting S from 1st equation
v t + V t = 40
t = 40 / (v + V) = 40 / (340 + 2) = .117 sec = 117 ms
The question is really specific enough, but I will take a guess. If nothing else changes (like the mass or the gravitational constant) then the Potential Energy will increase with an increase in height. Ep will decrease with a decrease in height.
If you are talking about Ke, then the height does not matter unless the object is moving up. Then it slows down. When that happens the Ke decreases because the formula for Ke = 1/2 m v^2. If v becomes less then Ke becomes less.
I suppose you could say if the object is going down and the distance is decreasing then the speed will increase. It's an inverse relationship.
I think you are best talking about Pe.
