determine the net force in the following scenario: Mr. Martinez needed to push a lab table across the floor. He pushed with a force of 20 newtons east, but could not move it. He then asked Ms. Carr for help. She pulled with a force of 10 newtons east. Together, they were able to move the table. What was the net force applied to the table?

28. evolution

29. environment, survive, offspring  

explanation:

think its the third option

report!

explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

auroras are generated by charged solar particles hitting molecules in earth's atmosphere. this usually happens in high latitudes, because our planet’s magnetic field tends to funnel these particles toward the poles. that’s why it can be experienced in northern ohio.