A spool has string wrapped around its center axle and is sitting on a horizontal surface. If the string is pulled at an angle to the horizontal when drawn from the bottom of the axle, the spool will
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A Young's double-slit apparatus is set up. A screen is positioned 1.30 m from the double slits, and the spacing between the two slits is 0.0392 mm. The distance between alternating bright fringes is 1.16 cm. What is the light source wavelength? (1 nm = 10?9 m)
a. 312 nm b. 346 nm c. 321 nm d. 350 nm e. 325 nm
The average molecular kinetic energy of a gas can be determined by knowing
A) only the number of molecules in the gas. B) only the volume of the gas. C) only the pressure of the gas. D) only the temperature of the gas. E) All of the above quantities must be known to determine the average molecular kinetic energy.
A consequence of surface tension for water is
A) capillary action. B) wet sand being firmer than dry sand. C) the different tastes of hot and cold oily soup. D) all of the above E) none of the above
A. The divergence is positive. B. The divergence is negative. C. The divergence is zero.