Atrain travels from new york to washington d. c. daily following a fairly straight path. if you made a scale model of the train tracks and determined that the distance the train travels is 240 inches, what is the most likely scale you are using?

What are atoms of the same element with varying number of neutrons

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 2 options: the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the cold balloon expands and rises. the warm balloon shrinks and sinks. the warm balloon expands and rises. the cold balloon shrinks and sinks.

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.