An 18-wheeler and a Volkswagon Beetle are rolling along with the same momentum. Which one is going faster?
A. 18-wheeler
B. Volkswagon beetle
C. same for both
D. impossible to say
B. Volkswagon beetle
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In a phase diagram, the _____________line gives the temperature where the first solid forms upon cooling an alloy of given composition C0 from the liquid phase.
Fill in the blank(s) with the appropriate word(s).
A hydrogen atom initially in the n = 6 state decays to the n = 2 state. The emitted photon is detected in a photographic plate
What is the wavelength of the detected photon? The lowest level energy state of hydrogen is -13.6 eV. (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J, c = 3.00 × 108 m/s) A) 410 nm B) 93.8 nm C) 1090 nm D) 93.1 nm
In order to jump off the floor, the floor must exert a force on you
A. in the direction of and equal to your weight. B. opposite to and equal to your weight. C. in the direction of and less than your weight. D. opposite to and less than your weight. E. opposite to and greater than your weight.
A resistor is made of a material that has a resistivity that is proportional to the current going through it. If the voltage across the resistor is doubled, what happens to the current through it?
a. It doubles. b. It quadruples. c. It increases by a factor of 23/2. d. It increases by a factor of 21/2.