If a vector's components are all negative, then the magnitude of the vector is negative
A) True
B) False
B
Physics & Space Science
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Suppose that a star has a parallax angle of 1/20 arcsecond. If so, it is
A) 20 light-years away. B) 1/20 parsec away. C) 10 parsecs away. D) 20 parsecs away
Physics & Space Science
Single-Slit Diffraction: A single thin slit forms a diffraction pattern, with the first minimum at an angle of 40.0° from central maximum. If monochromatic light of 530.0-nm wavelength is used for the illumination, what is the width of the slit?
A. 825 nm B. 791 nm C. 757 nm D. 723 nm E. 689 nm
Physics & Space Science
Which color in the right image represents the highest temperatures?
A) blue B) green C) orange D) red E) white
Physics & Space Science
Power: A light bulb operating at a dc voltage of 120 V has a resistance of 200 ?. How much power is dissipated in this bulb?
A. 100 W B. 60 W C. 72 W D. 14 mW E. 7.2 W
Physics & Space Science