Our eyes are detectors which are designed to detect visible light waves (or visible radiation). ... The electromagnetic spectrum includes gamma rays, X-rays, ultraviolet, visible, infrared, microwaves, and radio waves. The only difference between these different types of radiation is their wavelength or frequency.
Answer:
Explanation:
Gravity pulls everything down at the same rate of 9.8 m/s/s. If you're looking for the normal force, which is the same as the weight of the object, we'll find that, just in case.
w = mg which says that the normal force/weight of an object is equal to its mass times the pull of gravity:
w = 4.0(9.8) so
w = 39N
50*5=250
Momentum will be 250kgm/s^2
Halogens are highly reactive nonmetal elements in group 17 of the periodic table. ... Halogens are among the most reactive of all elements. They have seven valence electrons, so they are very “eager” to gain one electron to have a full outer energy level.
Answer:
0.2 m
Explanation:
PHASE 1
First, we calculate the distance the tongue moved in the first 20 ms (0.02 secs). We use one of Newton's equations of linear motion:
![s = ut + \frac{1}{2}at^2](https://tex.z-dn.net/?f=s%20%3D%20ut%20%2B%20%5Cfrac%7B1%7D%7B2%7Dat%5E2)
where u = initial velocity = 0 m/s
a = acceleration = ![250 m/s^2](https://tex.z-dn.net/?f=250%20m%2Fs%5E2)
t = time = 0.02 s
Therefore:
![s = 0 + \frac{1}{2} * 250 * (0.02)^2\\\\\\s = 0.05 m](https://tex.z-dn.net/?f=s%20%3D%200%20%2B%20%5Cfrac%7B1%7D%7B2%7D%20%2A%20250%20%2A%20%280.02%29%5E2%5C%5C%5C%5C%5C%5Cs%20%3D%200.05%20m)
PHASE 2
Then, for the next 30 ms (0.03 secs), we use the formula:
![distance = speed * time](https://tex.z-dn.net/?f=distance%20%3D%20speed%20%2A%20time)
This speed is the same as the final velocity of the tongue after the first 20 ms.
This can be obtained by using the formula:
![v = u + at\\\\=> v = 0 + (250 * 0.02)\\\\\\v = 5 m/s](https://tex.z-dn.net/?f=v%20%3D%20u%20%2B%20at%5C%5C%5C%5C%3D%3E%20v%20%3D%200%20%2B%20%28250%20%2A%200.02%29%5C%5C%5C%5C%5C%5Cv%20%3D%205%20m%2Fs)
Therefore:
distance = 5 * 0.03 = 0.15 m
Therefore, the total distance moved by the tongue in the 50 ms interval is:
0.05 + 0.15 = 0.2 m