An object is moving east, and its velocity 65 m/
nds. Which describes the
acceleration?
O negative acceleration of 4 m/s?
O positive acceleration of 4 m/s?
O positive acceleration of 9 m/s?
O negative acceleration of 9 m/s?

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?

A4.0-cm tall light bulb is placed a distance of 32.0 cm from a concave mirror having a focal length of 16.0 cm. determine the image distance

Two atoms with different mass number but the same atomic number are called a) elements. b) ions. c) isotopes. d) nuclei.