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Darya [45]
3 years ago
7

1. A wave has a wavelength of 5 m and a frequency of 2 Hz. At what speed/velocity does the

Physics
1 answer:
yuradex [85]3 years ago
4 0

Answer:

1.10m/s

2.0.1m

3.5Hz

Explanation:

v=velocity, f=frequency and T=wavelength

1.v=ft

v=2x5

=10m

2.v=ft

100=1000T

divide both sides by 1000

T=0.1m

3.v=fT

25=5f

divide both sides by 5

f=5Hz

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A 7.45 nC charge is located 1.66 m from a 4.22 nC point charge. (a) Find the magnitude of the electrostatic force that one charg
BaLLatris [955]

Answer:

a.F=1.03\times 10^{-7}N

b.Repulsive

Explanation:

We are given that

q_1=7.45nC=7.45\times 10^{-9}C

1nC=10^{-9}C

q_2=4.22nC=4.22\times 10^{-9}C

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We know that

Electrostatic force =F=k\frac{q_1q_2}{r^2}

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Using the formula

a.The magnitude of the electrostatic force=F=\frac{9\times 10^9\times 7.45\times 10^{-9}\times 4.22\times 10^{-9}}{(1.66)^2}

The magnitude of the electrostatic force=F=1.03\times 10^{-7}N

b.Both charge are positive .We know that when like charges repel each other and unlike charges attract to each other.

Therefore, the force between given charges is repulsive.

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3 years ago
Describe how the wavelength of a wave changes if the wave slows down but its frequency does not change.
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Calculate the current through the ammeter (look at photo)
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The speed at which the rider is spinning when the floor drops out beneath her is 5.42 m/s.

<h3>Acceleration of the rider </h3>

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a =  0.5 x 9.8

a = 4.9 m/s²

<h3>Speed of the rider</h3>

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v = √ar

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Learn more about speed here: brainly.com/question/6504879

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