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erastova [34]
3 years ago
7

A wave is moving at 18 m/s. If its wavelength is 3 meters, what is its frequency?

Physics
1 answer:
Vlada [557]3 years ago
7 0

here's the solution,

we know that,

=》

wave \: speed = wavelength \times frequency

so,

=》

18 = 3 \times f

=》

f =  \dfrac{18}{3}

=》

f = 6

frequency = 6 hertz

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My Physics teacher keeps giving us way too much work to do at home.

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Answer:

1. 3 m

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Explanation:

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Given:

v₀ = 33 m/s

v = 0 m/s

a = -5.5 m/s²

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To determine the equation you need, look for which variable you don't have and aren't solving for.  In this case, we aren't given time and aren't solving for time.  So look for an equation that doesn't have t in it.

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Substitute and solve:

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Δx = 3 m

2. "A plane starting from rest at one end of a runway accelerates at 4.8 m/s² for 1800 m.  How long did it take to accelerate?"

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v₀ = 0 m/s

a = 4.8 m/s²

Δx = 1800 m

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Equation: Δx = v₀ t + ½ a t²

Substitute and solve:

1800 m = (0 m/s) t + ½ (4.8 m/s²) t²

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4 0
3 years ago
Convert 25 cm to km using the method of dimensional analysis
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25 x 10^-5
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ivann1987 [24]

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\vec{B}=B_o\hat{i}\\\\\vec{v}=v_o\hat{j}

You use the Lorentz formula to known which is the direction of the magnetic force over the electron:

F=qv\ X\ B

which implies the cross product between the unitary vecors j and i, that is

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However, the minus sign of the charge of the electron changes the direction 180°. Hence, the direction is k. That is, to the EAST

3 0
3 years ago
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.A box falls to the ground from a delivery truck traveling at 30 m/s. After hitting the road, it slides 45 m to
Romashka-Z-Leto [24]

Answer:

t = 3 seconds

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So, the required time is 3 seconds.

8 0
3 years ago
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