Weegy: The model of the universe that suggests that the Sun is the center of the universe was first developed by: Copernicus. (More)

Weegy: If a sound is refracted away from the surface of the earth, [ this indicates that the air is cooler than the ground. ] User: Sound waves cannot travel through a/an Weegy: Sound waves cannot travel through a: vacuum. User: A wave with a period of 0.008 has a frequency of Weegy: A wave with a period of 0.008 second has a frequency of 125 Hz. User: What characteristic best explains when a loud noise echoes in a large room (More)

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Weegy: The purpose of an indicator is to test and determine the pH values of unknown solutions. User: A substance that turns litmus paper blue and contains hydroxide ions is most likely Weegy: If you find that a substance turns litmus paper to blue and contains hydroxide ions, it is most likely a base. User: The smallest unit of an element that has all of the properties of the element is a/an Weegy: The smallest unit of an element that has all of the properties of the element is an Atom. User: The valence of an element or radical us Weegy: The valence of an element or radical is equal to the number of positive or negative charges on the ion. User: Does cobalt produce a magnetic field? (More)

Weegy: If one body is positively charged and another is body is negatively charged, free electrons tend to: Move from the negatively charged body to the positively charged body. User: Magnet A doesn't have its poles labeled, but Magnet B has a clearly labeled north and south pole. If these two are brought into contact with one another, which of the following could you expect? (More)