The formula mg = kx describes a spring that is stretched by hanging an object on it. The constant k is called the spring constant. What are its units?
A) m s2/kg
B) kg/s2
C) kg s2
D) s/m kg
E) N m
B
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Monochromatic light from a He-Ne laser (? = 632.8 nm) is incident on a diffraction grating containing 5000 lines/cm. Determine the angle of the first-order maximum
a. 18.4° b. 39.2° c. 14.6° d. 27.7° e. 13.9°
Simple Harmonic Motion: The total mechanical energy of a simple harmonic oscillating system is
A. zero as it passes the equilibrium point. B. zero when it reaches the maximum displacement. C. a maximum when it passes through the equilibrium point. D. a minimum when it passes through the equilibrium point. E. a non-zero constant.
An ideal fluid, of density 900 kg/m3, flows at 4.80 m/s through a level pipe with radius of 0.22 cm. The pressure in the fluid is 1.3 × 10^5 N/m2 . This pipe connects to a second level pipe, with radius of 0.72 cm. Find the speed of flow in the second pipe
a. 51 m/s b. 1.5 m/s c. 0.45 m/s d. 16 m/s e. 4.9 m/s
The Balmer series of spectral lines corresponds to transitions ending in a state of quantum number n= ________.
Fill in the blank(s) with the appropriate word(s).