What is the frequency of a wave that has a period of 5 seconds? O A. 2 Hz
OB. 5 HZ
O C. 20 Hz
O D. 0.2 Hz

Note: the following questions are unrelated to the balmer series or the martian. refer to your course notes. a sun-sized star will spend most of its lifetime as a: white dwarf b. red giant c. protostar d. main-sequence star

Which atomic model was proposed as a result of j. j. thomson’s work?

Decreased sensitivity to an unchanging stimulus is known as