Which of the following is a period of the Cenozoic era?

a. Eocene
b. Quaternary
c. Cretaceous
d. Cambrian


b

Physics & Space Science

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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

Physics & Space Science

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

Physics & Space Science

Which planet has the second largest moon in the solar system?

a. Jupiter b. Saturn c. Uranus d. Neptune

Physics & Space Science

When an unstable Arsenic nucleus undergoes alpha decay, the nucleus formed is that of

a. Arsenic. b. Bromine. c. Germanium. d. Gallium. e. Selenium.

Physics & Space Science