When electromagnetic fields interact with charged particles, (1 point) Group of answer choices

they become stronger because they gain protons

they become weaker because they gain electrons

electromagnetic force will occur

electromagnetic forces are canceled

May someone explain how to do this question?

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?