Radioactivity Basics: An ? particle is also known as
A. an electron.
B. a positron.
C. a helium nucleus.
D. a high-energy photon.
Answer: C
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Refracting Telescope: A simple refracting telescope provides large magnification by employing
A. a short focal length objective and a short focal length eyepiece. B. a short focal length objective and a long focal length eyepiece. C. a long focal length objective and a short focal length eyepiece. D. a long focal length objective and a long focal length eyepiece.
The number of significant figures in 3.24 cm is
A. 2. B. 3. C. 4. D. 5.
A diffraction grating has 300 lines per mm. If light of frequency 4.76 × 1014 Hz is sent through this grating, at what angle does the first order maximum occur? (c = 3.00 × 108 m/s)
A) 56° B) 44° C) 22° D) 11° E) 28°
Process of Science: If there is a particularly cold winter in Minnesota one year, does this mean that global warming is wrong, or has ended?
What will be an ideal response?