Light exhibits the doppler effect. what does this tell us? light has properties in common with other types of waves. light and sound are the same types of waves. light changes speed as we approach the source. light is visible only under certain conditions.

Which statements about tornadoes are true? check all that apply. (a) about 12,000 tornadoes hit the united states every year. (b) a tornado looks like a funnel. (c) tornadoes are deadly atmospheric storms that cause millions in damages each year. (d) tornadoes can reach wind speeds of more than 300 miles per hour. (e) kansas is the state with the most tornadoes. (f) you will always notice a funnel before a tornado strikes.

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2