The experiments conducted by j. j thompson improved on the accuracy of the atomic model. what did his experiments lead him to conclude?
he concluded that most of the atom was empty space.
he concluded that there was a nucleus at the center of the atom.
he concluded that an atom was made up of smaller particles called electrons in a sea of positive charges.
he concluded that electrons orbit the nucleus.
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Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i. e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i. e. include the distance traveled to the first encounter)

Avoltaic cell converts chemical energy to

How many atoms of nitrogen are in the chemical formula ni(w on