The speed at which spiral galaxies rotate is often remarkably constant with increasing distance from the center of the galaxy; i. e., the galaxy's rotation curve is remarkably flat. the significance of this is that spiral galaxies contain significant amounts of matter which cannot be detected using electromagnetic radiation at any wavelength.

Which of the following is not a characteristic of s waves? a. travel slower than p waves. b. cannot be detected in locations more than 105° from an earthquake’s epicenter. c. travel through solids and liquids. d. only affect coastal regions.

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.

A4.0-cm tall light bulb is placed a distance of 32.0 cm from a concave mirror having a focal length of 16.0 cm. determine the image distance