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Leokris [45]
3 years ago
9

The type of lens that spreads out parallel light is a

Physics
1 answer:
ohaa [14]3 years ago
7 0

the answer is concave lens

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If the wavelength of orange light is 6 · 10-7 m, calculate its frequency. f = _______ Hz
11Alexandr11 [23.1K]

<u>Answer:</u>

Frequency of orange light = 5 \times 10^{14} 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 = 6.0 \times 10^{-7} m

We know that:

Speed of light = Frequency of orange light × Wavelength of orange light

Substituting the values in the above formula:

3 \times 10^8 = Frequency of orange light × 6.0\times10^{-7}

Frequency of orange light = \frac{3 \times 10^8}{6\times10^{-7}} =5 \times 10^{14} Hz

6 0
3 years ago
A circuit consists of a 9.0 mH inductor coil, a 230 Ω resistor, a 12.0 V ideal battery, and an open switch-all connected in seri
Nutka1998 [239]

Answer:

Explanation:

This is the case of L-R charging circuit , for which the formula is as follows

i = i₀ ( 1 - e^{\frac{-t}{\tau} )

Differentiating the equation on both sides

di / dt = i₀ / τ  x e^\frac{-t}{\tau}

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 = 1 - e^\frac{t}{\tau}

e^\frac{-t}{\tau} = .15

t / τ = ln .15

t = 74 μs

5 0
3 years ago
Why are frames of reference important for motion
Fynjy0 [20]
Because frame of reference decides are your forces positive or negative. It is important for the direction of motion.
7 0
3 years ago
A plane travels 1743 KM in 2 hours 30 minutes. How fast was the plane traveling?
Advocard [28]

Answer:

v=697.2km/h

Explanation:

Hello.

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

V=\frac{d}{t}

The distance is clearly 1743 km and the time is:

t=2h+30min*\frac{1h}{60min} =2.5h

Thus, the velocity turns out:

v=\frac{1743km}{2.5h}\\ \\v=697.2km/h

Which is a typical velocity for a plane to allow it be stable when flying.

Best regards.

5 0
3 years ago
A mass weight of 120N is hung from two strings. what is the tension?
kramer
The weight should be shared between the two string equally. Therefore, tension in each string, T is;

T = 120 N/2 = 60 N
7 0
3 years ago
Read 2 more answers
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