An atom of tungsten has a radius of 193. pm and the average orbital speed of the electrons in it is about 1.6 x 10 ms Calculate the least possible uncertainty in a measurement of the speed of an electron in an atom of tungsten. Write your answer as a percentage of the average speed, and round it to 2 significant digits 11% x10

The crust of earth may a- continets and ocean floors. b-continents only. c-layers of sedimentary rocks and continents. d-all of the above

Fission of uranium-235 products energy and a. isotopes of smaller elements b. isotopes of larger elements c. lighter isotopes of uranium d. heavier isotopes of uranium

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the independent variable in galileo's experiment? a. the speed of the ball b. the slope of the plane c. whether the ball moved d. what the ball was made of