During a total lunar eclipse, the Moon located in the umbra. The answer is letter A. For a total lunar eclipse to occur, the Sun, Earth and Moon must be aligned in a straight line. The Earth’s umbra complete covers the Moon. The earth’s umbra is about 870,000 miles wide.
Answer:
a
Explanation:
Answer:
X- rays, gamma rays.
Explanation:
Ionizing radiations are used to kill microorganisms. These radiations include x-rays, gamma rays and high energy electron beam. These radiations are passed into the cell. As a result, the cell component and the molecular structure gets damaged. These rays are used to kill microorganisms because they penetrate more than other rays.
Answer:
10N
Explanation:
Applying the Hooke law:
F = kx
F: Force
k: stiffness coefficient
x: stretched distance
F = 10N/m x 1m = 10N
The photon energy is 75 keV (kilo-electron volts) for polonium, assuming the free electron has no initial kinetic energy.
The maximum characteristic x-ray photon energy from the capture of a free electron into a K-shell vacancy is equal to the difference in binding energies between the K-shell and L-shell in the atom.
For polonium (Po), the atomic number is 84, which means it has 84 electrons. The K-shell of polonium is filled with 2 electrons, and the L-shell is filled with 8 electrons.
The K-shell binding energy for polonium can be found in a table of atomic data to be around 88 keV. The L-shell binding energy can also be found in the same table to be around 13 keV.
Therefore, the maximum characteristic x-ray photon energy from the capture of a free electron into a K-shell vacancy in polonium is:
E = (K-shell binding energy) - (L-shell binding energy)
= 88 keV - 13 keV
= 75 keV
To know more about binding energies refer here
brainly.com/question/30073915#
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Plasma...I believe is always a good conductor of electricity. I was tempted to say a solid, but not all solids are the same in composition and that goes for liquid and gas as well.
Hopefully this helped and good luck.