Where do the forces that make atoms interact come from?(1 point)
Responses
from the electric fields of charged subatomic particles
from the electric fields of charged subatomic particles
from the electric fields of neutral subatomic particles
from the electric fields of neutral subatomic particles
from the electric fields of neutral molecules
from the electric fields of neutral molecules
from the electric fields of charged molecules
from the electric fields of charged molecules
from the electric fields of charged subatomic particles
When two charged particles are moving toward each other, their velocities decrease until they eventually come to a stop. What happens afterward?(1 point)
Responses
They accelerate toward each other.
They accelerate toward each other.
They accelerate in opposite directions.
They accelerate in opposite directions.
They remain in the same place without moving.
They remain in the same place without moving.
They bond and accelerate together.
They accelerate toward each other.
A bar magnet is held in place while another bar magnet is placed near it. The second bar magnet spins around and attaches to the first magnet on one end. Which statement is correct about the energy stored in the magnetic field? (1 point)
Responses
The decrease in the energy stored in the system is proportional to the decrease in kinetic energy.
The decrease in the energy stored in the system is proportional to the decrease in kinetic energy.
The decrease in the energy stored in the system is proportional to the increase in kinetic energy.
The decrease in the energy stored in the system is proportional to the increase in kinetic energy.
The increase in the energy stored in the system is proportional to the decrease in kinetic energy.
The increase in the energy stored in the system is proportional to the decrease in kinetic energy.
The increase in the energy stored in the system is proportional to the increase in kinetic energy.
The decrease in the energy stored in the system is proportional to the decrease in kinetic energy.
Which of the following factors would decrease the magnetic field strength of an electromagnet?(1 point)
Responses
increasing the number of turns in the coil of wire
increasing the number of turns in the coil of wire
increasing the distances between the turns of the coil
increasing the distances between the turns of the coil
increasing the current or using a higher-voltage power source
increasing the current or using a higher-voltage power source
using an iron core or nail
increasing the distances between the turns of the coil
Physical Science B Semester Exam
4 of 294 of 29 Items
Question
Which of the following factors would decrease the magnetic field strength of an electromagnet?(1 point)
Responses
increasing the number of turns in the coil of wire
increasing the number of turns in the coil of wire
increasing the distances between the turns of the coil
increasing the distances between the turns of the coil
increasing the current or using a higher-voltage power source
increasing the current or using a higher-voltage power source
using an iron core or nail
using an iron core or nail
increasing the distances between the turns of the coil
What happens when thermal energy is applied to water?(1 point)
Responses
The water creates steam as soon as thermal energy is applied.
The water creates steam as soon as thermal energy is applied.
Its molecules gain kinetic energy.
Its molecules gain kinetic energy.
Its molecules gain potential energy.
Its molecules gain potential energy.
Its molecules lose kinetic energy.
Its molecules lose kinetic energy.