Avehicle's headlights should be utilized to ensure the safety of the driver and of others. a. during hours of darkness b. whenever conditions prevent a driver from clearly discerning a person or other motor vehicle on the highway from a distance of 1000 feet. c. in weather conditions requiring the windshield wipers to be in continuous use due to rain, mist, snow, fog, or other precipitation or atmospheric moisture. d. within 30 minutes after the sun sets, all night and until 30 minutes before the sun rises. e. all of the above

What field of science did harry hess study?

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home.what is displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.