Lens-Maker Formula: A certain camera uses a double-convex lens made of glass with an index of refraction of 1.60. This lens has a radius of curvature of magnitude 12 cm for the first surface and one of magnitude 24 cm for the second surface. What is the focal length of this lens?
Fill in the blank(s) with the appropriate word(s).
13 cm
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Work Done by a Gas: A gas expands at constant temperature from an initial volume of 0.040 m3 and an initial pressure of 210 kPa until its pressure drops to 135 kPa. How much work is done by the gas during this expansion? (R = 8.31 J/mol ? K)
A. 3.0 kJ B. 3.7 kJ C. 4.1 kJ D. 5.6 kJ E. 7.9 kJ
In which type of radioactive decay does the atomic number of the parent nucleus change?
A) the atomic number changes in all three types of decay B) electron capture C) beta decay D) alpha decay
A conducting sphere 45 cm in diameter carries an excess of charge, and no other charges are present
You measure the potential of the surface of this sphere and find it to be 14 kV relative to infinity. (k = 1/4??0 = 8.99 × 109 N • m2/C2 ) The excess charge on this sphere is closest to A) 0.35 nC. B) 79 nC. C) 315 nC. D) 350 nC. E) 700 nC.
A wave is a propagation of ______________
Fill in the blank(s) with correct word