Author: Anonymous

Which of the following is an example of a scientific model?

Most star names, such as Aldebaran and Betelgeuse, are___ in origin.

The seasons are caused by the precession of Earth’s axis.

The ____ of a gas is a measure of the average speed of the particles (atoms or molecules) in the gas.

An evening or morning star is a planet.

Kepler’s first law of planetary motion implies that

Microwaves have ________ wavelengths and ________ energies compared to the visual band.

You and your friend put the palms of your hands together and push equally on each other so your hands don’t move. Which law(s) does this follow? Choose the best answer. I. Newton’s first II. Newton’s second III. Newton’s third IV. Newton’s law of gravitation  

The celestial equator always crosses the horizon at the east point and west point.

The Hγ line has a wavelength of 434.0 nm when observed in the laboratory. If the Hγ line appears in a stars spectrum at 434.5 nm, what is the radial velocity of the star?