In addition to filling lakes with sediment, why is eutrophication a biological concern?
1 answer:
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Answer:
F = 0 N
Explanation:
The direction of air resistance and frictional force will be same and opposite to the direction of the driving fore of dogs. Therefore, the resultant force can be given as follows:
here,
driving force of dogs = 600 N
Frictional Force = 150 N
Resultant Force = 450 N
Therefore,
<u>F = 0 N</u>
Answer:
Δf = 0.00003 MHz = 30 Hz
Explanation:
The apparent frequency due to the motion of receiver towards the source is given by Doppler's effect, while the source is stationary. Therefore, the formula is given as follows:
where,
f = apparent frequency
c = speed of light = 3 x 10⁸ m/s
v₀ = velocity of observer = 46 m/s
f₀ = Original Frequency = 175 MHz = 175 x 10⁶ Hz
Therefore,
f = 175.00003 MHz
Therefore, the change in frequency is:
Δf = f - f₀
Δf = 175.00003 MHz - 175 MHz
<u>Δf = 0.00003 MHz = 30 Hz</u>