Aleaf electroscope is a device that indicates the existence of electric charge on an object. the leaves spread apart when an object is brought near or touches the electroscope. what observation would suggest that the object touched the electroscope? a) the leaves remained apart after the charged object was removed. b) the leaves slowly came back together after the charged object was removed. c) the leaves spread apart a lot when the charge was brought near the electroscope. d) no observation could determine if the charged object touched the electroscope.

Which term describes the number of waves that pass a given point in a given time? crest frequency trough wavelength

How does photosynthesis show the conservation of mass and energy?

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.