Answer:
c) Anti-top
Explanation:
Protons are particles which belong to the hadron group of particles. The antimatter equivalent particle is antiproton
Electrons are particles that belong to the fermion group of particles. The antimatter equivalent is antielectron
Antitop quarks are particles that belong to the group family of particles. They are the antimatter equivalent of top quarks.
Gluons are particles that belong to the group of particles called bosons.
Tau neutrinos are particles that belong to the fermion group of particles. The antimatter equivalent is Tau antineutrino.
Answer:

Explanation:
According to the law of conservation of energy, the energy of the absorbed photon must be equal to the binding energy of the electron plus the energy of the released electron:

1 eV is equal to
, so:

Solving for
and replacing the given values:

Answer:
The answer to your question is m₂ = 38.5 kg
Explanation:
Data
distance = d = 2.1 x 10⁻¹ m
Force = 3.2 x 10⁻⁶ N
m₁ = 55 kg
m₂ = ?
G = 6.67 x 10 ⁻¹¹ Nm²/kg²
Process
1.- To solve this problem use Newton's law of Universal Gravitation.
F = G m₁m₂ / r²
-Solve for m₂
m₂ = Fr² / Gm₁
2.- Substitution
m₂ = (3.2 x 10⁻⁶)(2.1 x 10⁻¹)² / (6.67 x 10⁻¹¹)(55)
3.- Simplification
m₂ = 1.411 x 10⁻⁷ / 3.669 x 10⁻⁹
4.- Result
m₂ = 38.5 kg