7. What is the force on a 1,000 kg elevator that is in a free-fall after the elevator cable broke?

What defines the mass number of an isotope? a. the sum of the neutrons and protons b. the sum of the neutrons and electrons c. the number of neutrons d. the number of protons

In order for the bug to fly through the air a force has to push the bug forward. identify this force. how does the bug produce

Juan created a chart to him study for a test. which headings best complete the chart? x: transparent objects y: opaque objects x: opaque objects y: transparent objects x: high frequency waves y: low frequency waves x: low frequency waves y: high frequency waves