<u>Answer:</u>
Frequency of orange light =
Hz
<u>Explanation:</u>
We are given the wavelength of the orange light and we are to find the value of its frequency.
Wavelength of orange light = 
We know that:
Speed of light = Frequency of orange light × Wavelength of orange light
Substituting the values in the above formula:
= Frequency of orange light × 
Frequency of orange light =
Hz
Answer:
Explanation:
This is the case of L-R charging circuit , for which the formula is as follows
i = i₀ ( 1 -
)
Differentiating the equation on both sides
di / dt = i₀ / τ x 
i is current at time t , i₀ is maximum current , τ is time constant which is equal to L / R where L is inductance and R is resistance of the circuit .
τ = L / R = 9 x 10⁻³ / 230
= 39 x 10⁻⁶ s
i₀ = 12 / 230 = 52.17 x 10⁻³
di / dt (at t is zero) = 52.17 x 10⁻³ / 39 x 10⁻⁶
= 1.33 x 10³ A / s
Time to reach 85 % of steady state or i₀
.85 = 
= .15
t / τ = ln .15
t = 74 μs
Because frame of reference decides are your forces positive or negative. It is important for the direction of motion.
Answer:

Explanation:
Hello.
In this case, since the velocity is computed via the division of the distance traveled by the elapsed time:

The distance is clearly 1743 km and the time is:

Thus, the velocity turns out:

Which is a typical velocity for a plane to allow it be stable when flying.
Best regards.
The weight should be shared between the two string equally. Therefore, tension in each string, T is;
T = 120 N/2 = 60 N