Particle a has very little mass in comparison to particle b. both particles are in the same atom. which is the best conclusion about particles a and b?

they have opposite charges.
they are located in the nucleus together.
particle a has a negative charge, and particle b is neutral.
particle a orbits the nucleus, and particle b is located in the nucleus.

Amoving company collects data about couches they move and displays the data in a table. the force along the ramp, the angle of the ramp, and the height the couch is raised to are shown. which statements correctly compare the work done to move the couches? check all that apply. the same amount of work is done for couches 1 and 3. the same amount of work is done for couches 2 and 3. the work for couch 1 is greater than the work for couch 2. the work for couch 2 is less than the work for couch 3. the work for couch 3 is greater than the work for couch 1. the work for couch 2 is greater than the work for couch 1.