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aliina [53]
3 years ago
5

All electromagnetic waves travel in vacuum at the speed of c=3×10^8 m/s. Find the wavelength of microwaves of frequency 10^10 Hz

Physics
1 answer:
erica [24]3 years ago
5 0
Recall the wave equation, c=f\lambda where c is the speed of the wave (m/s), f is the frequency of the wave (Hz) and λ is the wavelength of the wave (m).

c=f\lambda \Rightarrow \lambda =  \frac{c}{f} so \lambda =  \frac{3 \times 10^8}{10^{10}} = 0.03 \text{m}
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3 years ago
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When an RL circuit is connected to a battery, which is true about its initial and final states?
zubka84 [21]

Answer:A

Explanation:

In R-L circuit current is given by

i=i_0\left [ 1-e^{\frac{-t}{L/R}}\right ]

where i=current at any time t

i_0=maximum\ current

R=resistance

L=Inductance

at t=0 e^{\frac{-t}{L/R}} approaches to 1

therefore i=i_0\left [ 1-1\right ]

i=0

when t approaches to \infty,  e^{\frac{-t}{L/R}} approaches to zero

thus i=i_0

thus we can say that initially circuit act as broken wire with zero current

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7 0
3 years ago
Pls help I will give brainliest
Firlakuza [10]

Answer: Pretty sure the answer is B but this kind of looks like a test question.

Explanation:

8 0
2 years ago
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Imagine that you are jumping rope, explains how these 3 types of energy would be present while doing so. (Chemical, Sound, Mecha
suter [353]

Answer:

Chemical you bodily functions while you are jumping

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Mechanical is you jumping up and down and the jump rope spinning a constant direction

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5 0
3 years ago
As an aid in working this problem, consult Concept Simulation 11.1. The volume flow rate in an artery supplying the brain is 3.5
klemol [59]

Answer

given,

flow from the artery = 3.5 x 10⁻⁶ m³/s

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area = π R²

       = π x (5.8 x 10⁻³)²

       = 1.06 x 10⁻⁴ m²

v = \dfrac{Q}{A}

v = \dfrac{3.5 \times 10^{-6}}{1.06 \times 10^{-4}}

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b) new velocity of flow

Radius = R' = R/4

 A V = A' V'

 R² V = R'² V'

 R^2 V = (\dfrac{R}{4})^2 V'

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  V' =0.528 m/s

5 0
2 years ago
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