The curved surface of a 50. cm focal length "plano-convex" lens has a radius of curvature of 30. cm. What is the refractive index of the glass?
What will be an ideal response?
n = 1.6
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Nuclear fission is the process by which
A) a number of smaller nuclei combine to form a larger nucleus with the release of energy B) electrons are rearranged inside an atom, releasing energy C) an electron is ejected from the nucleus of an atom, releasing energy D) large nuclei break up into smaller nuclei with the release of energy
Which of the substances, water or mercury, could be used to build a thermometer that measures temperatures from -10°C to 110°C?
1.water only 2.mercury only 3.both water and mercury 4.neither water nor mercury
A long straight wire on the z-axis carries a current of 6.0 A in the positive direction. A circular loop in the xy-plane, of radius 10 cm, carries a 1.0-A current, as shown in the figure. Point P, at the center of the loop, is 25 cm from the z-axis. An electron is projected from P with a velocity of 1.0 × 106 m/s in the negative x-direction. What is the y component of the force on the electron?
A) zero B) -1.0 x 10^-18 N C) +2.0 x 10^-18 N D) -2.0 x 10^-18 N E) +1.0 x 10^-18 N
The notation s?1 means the same thing as
a. 1/s. b. Hz. c. per second. d. none of the above