To solve this problem it is necessary to apply the concepts related to Wavelength depending on the frequency and speed of light.
The equation that meets these parameters is given by

Where,
c = Speed of light

f = Frequency
Our values are given as
velocity of light in free space
f = 2Hz
Replacing we have that

Therefore the correct answer is B.
Answer: energy
Explanation: A wave is a disturbance that transfers energy as it travels through medium.
The approximate acceleration of gravity for an object above the earth's surface is 9.8 m/s².
<h3>
Acceleration due to gravity </h3>
The acceleration due to gravity of an object above the Earth's surface is calculated from Newton's second law of motion and Newton's law of universal gravitation.
<h3>Force between the object and Earth</h3>

<h3>Weight of the object</h3>

Solve (1) and (2)
mg = GmM/R²
g = GM/R²
where;
- M is mass of Earth
- G is gravitational constant
- R is radius of the Earth = 6,371 km
g = (6.673 x 10⁻¹¹ x 5.98 x 10²⁴)/(6,371 x 10³)²
g = 9.8 m/s²
Learn more about acceleration due to gravity here: brainly.com/question/88039
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It's B because when you throw something it doesn't go up it slowly descends downward
Answer:
es un motor de combustión interna con encendido por chispa.