______________ principle explains why objects float or sink in a fluid

a. Newton's
b. Pascal's
c. Bernoulli's
d. Archimedes'


d

Physics & Space Science

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Which of the following is not one of the three main categories of observation generally used by astronomers?

A) filtering to look at just a single color from an object B) time monitoring to track how an object's brightness varies with time C) spectroscopy to spread an object's light into a spectrum D) imaging to get a picture of an astronomical objects

Physics & Space Science

Saturn's rotation is fast and differential, much like Jupiter's

Indicate whether the statement is true or false

Physics & Space Science

Which of the following is not one of the postulates

proposed by Dalton in his atomic theory? a) No atoms are gained, lost, or changed in identity during a chemical reaction. b) All elements can be placed in a periodic table showing their reaction capabilities. c) Each element is composed of small, indivisible particles called atoms. d) Chemical combination is the bonding of a definite number of atoms into a molecule.

Physics & Space Science

When a light wave enters into a medium of different optical density,

A) only its speed changes. B) its speed and frequency change. C) its speed and wavelength change. D) its frequency and wavelength change. E) its speed, frequency, and wavelength change.

Physics & Space Science