First recall the equation that relates frequency to wavelength:
v = fw
Note that the v is the speed of light, a constant. Now plug in the information we know!
(3×10^8) = (6.67 × 10^14) w
Hit the numbers on the calculator and you'll get the wavelength, w. If you comment your answer I'll check it for you. :)
If it is eight meters per second, and the total distance he has to travel is four hundred meters to complete the race, you divide the total length needed to travel by the average speed per second to see the amount of seconds required to complete the race at that speed.
8 meters per second: Speed of runner
400 meters: Total distance
400/8=50
50 seconds to complete the race at the eight of 8m/s.
The voltage as a function of time for the power source oscillating at the given frequency is determined as V = 169.7sin(120πt).
<h3>
Peak voltage</h3>
The peak voltage of the source is calculated as follows;
Vrms = 0.7071V₀
120 = 0.7071V₀
V₀ = 120/0.7071
V₀ = 169.7 V
<h3>Angular frequency of the wave</h3>
ω = 2πf
where;
f is frequency = 60 Hz
ω = 2π x 60
ω = 120π rad/s
<h3>Voltage equation as function of time</h3>
V = V₀sin(ωt)
V = 169.7sin(120πt)
Learn more about peak voltage here: brainly.com/question/6249123
I don't believe there is a specific amount of time that it takes to learn. Some people may learn faster than others. What matters is that you practice consistently and you will learn at a faster pace than if you don't practice often.