The answer is lanthanide! Hope this helps. Have a great day.
<h2>
Answer: <u>
Visible</u>
light</h2>
Explanation:
The portion visible by the human eye of the electromagnetic spectrum is between 380 nm (violet-blue) and 780 nm (red), <u>but we can approximate this range to 400nm to 740nm</u>. Which means this part of the spectrum is located between ultraviolet light and infrared light.
Note the fact only part of the whole electromagnetic spectrum is visible to humans is because the receptors in our eyes are only sensitive to these wavelengths. That is why the visible light (also called the visible portion of the electromagnetic spectrum) is the portion we can see.
Therefore:
This portion is called <u>visible</u> light and consists of wavelengths of light from about 400 to 740 nm.
Gravity!! It also keeps the planets in orbit!
Answer:
minimum two photogate
Explanation:
The photogate allows us to activate the measurement of time, so we must place at least two of them, one at the beginning of the movement to measure the initial time and another at the end of the movement to measure the final time, of course we must have measured the distance. This gives us the average speed between the two photocells
For measurements with more changes curves, slopes, one photogate must be placed at the beginning of the curve or slope and another at the end.
Answer: A, protons
Why: it just is