A jet is traveling at 100 meters per second and then accelerates at 10 meters per second squared for 100 meters. what is it's final speed?
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Ответ:
109.6m/s
Explanation:
Given parameters:
Initial velocity = 100m/s
Acceleration = 10m/s²
Distance = 100m
Unknown:
Final speed = ?
Solution:
To solve this problem, we use the expression below;
V² = U² + 2aS
V is the final velocity
U is the initial velocity
a is the acceleration
S is the distance
V² = 100² + 2(10)(100)
V² = 10000 + 2000
V² = 12000
V = √12000 = 109.6m/s
Ответ:
4.(615384)Hz
Explanation:
Firstly, let's take a note that the speed of light is much higher than 30m/s, on the other hand visible light has wavelengths measured in nanometers, so I assume we're just supposed to assume the values in the question for the purpose of solving it.
If a wave moves through a point with speed v and has wavelength l, In each second we observe v/l cycles - and cycles per second is the frequency!
F = 30m/s / 6.5m = 4.(615384)/s = 4.(615384)Hz