Tanks of compressed gas must be kept away from heat sources. If a compressed–gas tank is heated too much, it may explode and cau
se a great deal of damage. Which of the following best explains why a compressed–gas tank can explode if it is heated?
A. As the gas gets hotter, the molecules gain energy and move farther apart, causing the gas to expand.
B.As the gas gets hotter, the molecules expand, causing the gas to exert more pressure.
C.As the gas absorbs heat, the molecules break apart, increasing the volume of the gas.
D.As the gas absorbs heat, the molecules move more quickly, making the gas more corrosive.
A. As the gas gets hotter, the molecules gain energy and move farther apart, causing the gas to expand.
B.As the gas gets hotter, the molecules expand, causing the gas to exert more pressure.
C.As the gas absorbs heat, the molecules break apart, increasing the volume of the gas.
D.As the gas absorbs heat, the molecules move more quickly, making the gas more corrosive.
2 answers:
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1) Frequency:
the energy of the photon absorbed must be equal to the ionization enegy of the atom, which is
The energy of a photon is given by
where is the Planck's constant. By using the energy written above and by re-arranging thsi formula, we can calculate the frequency of the photon:
2) Wavelength: 91.2 nm
The wavelength of the photon can be found from its frequency, by using the following relationship:
where is the speed of light and f is the frequency. Substituting the frequency, we find
Answer:
v = 5.24[m/s]
Explanation:
Este problema se puede resolver por medio del principio de la conservación de la energía, donde la energía potencial es igual a la energía cinética. Es decir a medida que el carrito desciende su energía potencial disminuye, pero su energía cinética aumenta.
Donde:
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