An object 3.4 mm tall is placed 25 cm from the vertex of a convex spherical mirror. The radius of curvature of the mirror has magnitude 73 cm. (a) How far is the image from the vertex of the mirror? (b) What is the height of the image?
What will be an ideal response?
(a) 15 cm
(b) 2.0 mm
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Size of the Nucleus: Estimate the mass of a nucleus with radius 2.8 ×10-15 m. (1 u = 1.6605 × 10-27 kg)
A. about 2.1 × 10-26 kg B. about 7.5 × 10-27 kg C. about 2.3 × 10-26 kg D. about 4.7 × 10-26 kg
Why do astronomers believe chondrite meteorites are about 4.6 billion years old-formed when the Solar system formed?
A. There is no other reasonable time period in the solar system's history when any meteoroids could have formed. B. Radioactive dating can be used to determine their age. C. Their chemical composition suggests they are pieces broken off Mars, which is believed to have formed at that time. D. The chemicals they are made of were only common at the formation of the solar system.
Monochromatic light of wavelength 500 nm is incident normally on a diffraction grating. If the third-order maximum of the diffraction pattern is observed at 32.0° from the central spot, how many TOTAL number of maxima can be seen?
A) 5 B) 7 C) 10 D) 11 E) 13
In what sense can you truthfully say that you are a part of every person around you?
A) We all live on the same planet and share the same resources. B) We are continually exchanging our atoms. C) We all share the same genetic code. D) There are more people alive now than have ever lived.