Which of the following is a period of the Cenozoic era?
a. Eocene
b. Quaternary
c. Cretaceous
d. Cambrian
b
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Standing Sound Waves: One of the harmonics of a column of air in a tube that is open at one end and closed at the other has a frequency of 448 Hz, and the next higher harmonic has a frequency of 576 Hz. How long is the tube? The speed of sound in air is 343 m/s.
A. 1.34 m B. 0.670 m C. 0.335 m D. 1.00 m E. 2.68 m
Which planet has the second largest moon in the solar system?
a. Jupiter b. Saturn c. Uranus d. Neptune
When an unstable Arsenic nucleus undergoes alpha decay, the nucleus formed is that of
a. Arsenic. b. Bromine. c. Germanium. d. Gallium. e. Selenium.
The process of changing the shape of the lens, and hence adjusting its focal length, is referred as accommodation
Indicate whether the statement is true or false