A magnifying lens has a focal length of 10 cm. A person has a near point of 25 cm and a far point at infinity. What is the angular magnification of the lens for that person when their eyes are focused at infinity?
What will be an ideal response?
Answer: 2.5 x
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The entropy of the surroundings remains constant during an adiabatic change even if the change is irreversible
Indicate whether the statement is true or false
An observer on Earth's equator would find _______
a. the celestial equator passing at 45 degrees above the northern horizon. b. The celestial equator passing at 45 degrees above the southern horizon. c. that the celestial equator coincides with the horizon. d. the celestial equator passing directly overhead. e. None of the above are true.
Fragmenting during meteorite impacts caused the vesicular basalts found among the lunar samples
Indicate whether the statement is true or false
When an unstable nucleus decays by emitting an alpha particle, the atomic number Z of the nucleus
A) increases by 4. B) increases by 2. C) decreases by 2. D) decreases by 4. E) remains unchanged.