kiannadgarnica
17.12.2020 •
Physics
A toy cannon of mass 1.0 kg is initially at rest on a horizontal surface when it launches a 0.05 kg projectile with a velocity of 14.7 m/s at an angle of 60o above the horizontal. What is the speed of the 1.0 kg cannon immediately after the projectile is released, assuming friction is negligible?
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Ответ:
Atomic Number and Mass Number definition
Atomic number and mass number are numbers that always remain whole because they are obtained by counting whole numbers (protons, neutrons, and electrons). When you sum up the numbers of the mass number and the atomic number for an atom (A-Z) it will correspond to the total number of subatomic particles present in the atom. They are forms of the same atom that differ only in their number of neutrons are called isotopes. When you sum them up, the number of protons and the number of neutrons will determine an element's mass number: mass number = protons + neutrons.