PHY 102 WEEK 4 EXAM PRACTICE STUDY
GUIDE 2026 SOLVED QUESTIONS GRADED A+
◉ Why do most alpha particles fired at a gold foil pass through
undeflected? Answer: atoms are mostly empty space
◉ What is the energy of the 3rd excited state if the electron in the
ground state is -8.2 eV? Answer: -0.51 eV
◉ Why does a baseball player move their hand backward when
catching a ball? Answer: time of impact is increased
◉ What happens to the velocity of an object in free fall? Answer:
velocity increases
◉ Why does a person in a pool appear to have short legs? Answer:
refraction
◉ Is one of the Keck telescopes a reflecting telescope? Answer: True
◉ In the SI system, how is mass measured? Answer: kilograms
, ◉ Is the universe expanding? Answer: True
◉ Which hits first: a bullet fired horizontally or a bullet dropped?
Answer: the dropped one
◉ What is far-sightedness called? Answer: hyperopia
◉ About the size of what is a white dwarf? Answer: Earth
◉ Do two perpendicular polarizers let any light through? Answer:
False
◉ What does the slope of a velocity vs time graph tell you? Answer:
acceleration
◉ Ignoring air resistance, what do falling objects have constant?
Answer: acceleration
◉ For an object farther from a concave mirror than the focal length,
what type of image is formed? Answer: real, upright
◉ What is the voltage across an 8.3 Ω resistor with 5 A through it?
Answer: 41.5 V
GUIDE 2026 SOLVED QUESTIONS GRADED A+
◉ Why do most alpha particles fired at a gold foil pass through
undeflected? Answer: atoms are mostly empty space
◉ What is the energy of the 3rd excited state if the electron in the
ground state is -8.2 eV? Answer: -0.51 eV
◉ Why does a baseball player move their hand backward when
catching a ball? Answer: time of impact is increased
◉ What happens to the velocity of an object in free fall? Answer:
velocity increases
◉ Why does a person in a pool appear to have short legs? Answer:
refraction
◉ Is one of the Keck telescopes a reflecting telescope? Answer: True
◉ In the SI system, how is mass measured? Answer: kilograms
, ◉ Is the universe expanding? Answer: True
◉ Which hits first: a bullet fired horizontally or a bullet dropped?
Answer: the dropped one
◉ What is far-sightedness called? Answer: hyperopia
◉ About the size of what is a white dwarf? Answer: Earth
◉ Do two perpendicular polarizers let any light through? Answer:
False
◉ What does the slope of a velocity vs time graph tell you? Answer:
acceleration
◉ Ignoring air resistance, what do falling objects have constant?
Answer: acceleration
◉ For an object farther from a concave mirror than the focal length,
what type of image is formed? Answer: real, upright
◉ What is the voltage across an 8.3 Ω resistor with 5 A through it?
Answer: 41.5 V
