Equation: v= (wavelength)(frequency)
V= 3.00 x 10^8 {I think you’ve meant to square it}
Wavelengths = ?
Frequency= 9.23 x 10^7 {I think you’ve meant to square it}
Plug what you have in the formula above:
3.00 x 10^8 = (wavelength)(9.23 x 10^7)
Now DIVIDE 9.23 x 10^7 by both sides.
You will get (3.00 x 10^8) / (9.23 x 10^7)
The wavelength = 3.25 meters
Hope this helps!
Answer:
Explanation:
The ant is under an uniform motion. So, we get the time taken by the ant to cross the strip from the definition of speed:
In this case, we use the vertical speed of the ant (), since the ant crosses the strip that is 34.2 cm wide (vertically). So:
Answer: B
Explanation:
Because the ramp is too high, the forces aren't enough to push onto the car stuck down.
This is a concrete example of the Doppler effect. This effect is the change of frequency experienced by the listener or the observer with respect to their relative distance to the source of the sound. There can be two equations to be applied: to the approaching source, and to the receding source.
Approaching source:
frequency observed = [v/(v-v,source)]*frequency of source, where v is the velocity of sound . Substituting,
1000 = [340/(340-v,source)]*frequency of source <---- equation 1
Receding source:
frequency observed = [v/(v+v,source)]*frequency of source, where v is the velocity of sound . Substituting,
800 = [340/(340+v,source)]*frequency of source <---- equation 2
Rearranging equation 1: [1000(340-v,source)]/340 = frequency of source
Equation 2: 800 = [340/(340+v,source)]*frequency of source
Substituting equation 1 to equation 2:
800 = [340/(340+v,source)]*[1000(340-v,source)]/340
Solving using the scientific calculator under shift-solve feature,
v,source = 37.78 m/s
Therefore, the train is moving at 37.78 m/s.