These waves are traveling at the same speed. Which wave has the highest frequency?
2 answers:
Answer : Highest frequency = wave A
Explanation :
The number of vibrations per second is called the frequency of the wave and the distance between two consecutive crests or troughs is called the wavelength of the wave.
The relation between the wavelength and the frequency is inverse i.e.
It is clear from the given figure that the wave (a) have least wavelength i.e the distance between two crests or troughs is least.
So, the wave (a) will have highest frequency.
Hence, the correct option is wave (a).
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Answer:
so rate constant is 4.00 x 10^-4
Explanation:
Given data
first-order reactions
85% of a sample
changes to propene t = 79.0 min
to find out
rate constant
solution
we know that
first order reaction are
ln [A]/[A]0 = -kt
here [A]0 = 1 and (85%) = 0.85 has change to propene
so that [A] = 1 - 0.85 = 0.15.
that why
[A] / [A]0= 0.15 / 1
[A] / [A]0 = 0.15
here t = (79) × (60s/min) = 4740 s
so
k = - {ln[A]/[A]0} / t
k = -ln 0.15 / 4740
k = 4.00 x 10^-4
so rate constant is 4.00 x 10^-4
Answer:
9.6 m/s
Explanation:
Angle of projection, θ = 28°
Horizontal distance, R = 7.8 m
Let the velocity of projection is given by u.
The formula used to find the velocity of projection is given by
u = 9.6 m/s
Thus, the velocity of projection is 9.6 m/s.