X-rays with high photon energies (above 5–10keV, below 0.2–0.1nm wavelength) are called hard X-rays, while those with lower energy (and longer wavelength) are called soft X-rays. Due to their penetrating ability, hard X-rays are widely used to image the inside of objects, e.g., in medical radiography and airport security. By contrast, soft X-rays are easily absorbed in air; the attenuation length of 600 eV (~2nm) X-rays in water is less than 1 micrometer.
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Answer:
The first room is correct.
Explanation:
The higher the temerature the more air molecules it contains.
<span>Drought
....................</span>
Answer:
it is very large and invisible
Answer:
166.8 m
30.18 m/s
Explanation:
u = Velocidad inicial del automóvil = 120 km/h =
v = Velocidad final = 0
s = Desplazamiento
a = Aceleración
t = Tiempo tomado = 10 s
De las ecuaciones cinemáticas de movimiento tenemos
La distancia que tarda el automóvil en detenerse es 166.8 m
Ahora s = 30 m
La velocidad a la que el otro automóvil sería golpeado es 30.18 m/s.