Leptons are the fundamental particles that are the building blocks of hadrons
Indicate whether the statement is true or false
F
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If a body were in orbit very near the surface of the earth, its centripetal acceleration would be
a. equal to g b. smaller than g c. larger than g d. dependent on its mass e. none of the above
Which of the following statements is not an assumption used in models of galaxy formation?
A) The very early universe had an almost perfectly uniform distribution of hydrogen and helium gas. B) Some regions in the universe were slightly more dense than others. C) The universe is expanding. D) Gas contracted to form the disks of galaxies before any stars were born.
A large heavy truck and a small baby carriage roll down a hill. Neglecting friction, at the bottom of the hill, the baby carriage will likely have
A) less momentum. B) about the same momentum. C) more momentum.
What needs to be done to convert a neutral nitrogen atom into an N-3 species?
A) add three electrons B) remove three electrons C) remove three protons D) add three protons E) add three nitrogens