The speed of a wave is the same as the speed of the particles displaced by the wave
a. True
b. False
Indicate whether the statement is true or false
False
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A 10-g bouncy ball is confined in a 8.3-cm-long box. What is its minimum energy? (h = 6.626 × 10-34 J ? s)
A) 3.2 × 10-46 J B) 9.4 × 10-75 J C) 8.1 × 10-65 J D) 1.3 × 10-20 J
How necessary is soap for removing salt from your hands?
A) Soap is necessary because it has both a polar and nonpolar end to interact with the positive and negative ions in the salt. B) Soap is necessary because it creates a film on the surface of your skin, shielding it from interacting with the ionic charges of the salt. C) Soap is not at all necessary for removing salt from your hands. The strong ion-dipole interactions between fresh water and the salt are most sufficient to lift the salt away from your hands. D) Soap is not necessary because there are no electrical charges on the skin of your hands for the salt to interact with.
: For a more precise lattice parameter, determine the lattice parameter from each of the peak intensities for tungsten in Figure 15.4. Then plot the value of a determined for each peak intensity as a function of the value of sin2 ? used to calculate a. The most accurate value of a results from extrapolation of sin2 ? to 1.0.
(a) Present your data table and plot. (b)What lattice parameter results?
A horizontal 52-N force is needed to slide a box across a flat surface at a constant velocity of 3.5 m/s. What is the coefficient of kinetic friction between the box and the floor?
A) 0.11 B) 0.09 C) 0.10 D) 0.13