What wavelength (in ?m) is associated with the Paschen series for n = 4? (RH = 1.097 × 10^7 m?1)
a. 320
b. 530
c. 2.7
d. 1.9
e. 0.5
d
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Given that the charge on an up quark is +2/3 and the charge on a down quark is ?1/3, which combination represents a proton?
A. uud B. udd C. uuu D. ddd
The number 52,600,000,000 would be written in scientific notation as ____________________
Fill in the blank(s) with correct word
Total Internal Reflection: A ray of light traveling in air makes a 63.0° angle with respect to the normal of the surface of a liquid. It travels in the liquid at a 39.2° angle with respect to the normal. Find the critical angle for total internal reflection for this interface.
Fill in the blank(s) with the appropriate word(s).
A Geiger counter registers a count rate of 8,000 counts per minute from a sample of a radioisotope. The count rate 24 minutes later is 1,000 counts per minute. What is the half-life of the radioisotope?