A single billiard ball , traveling at 20 m /s, strikes a cluster of 15 balls on a billiard table . What can be said about the balls on the table after the collision ? (1 point ) The kinetic energy will be divided equally among the 15 balls .
Each ball will have a velocity equal to 20 m/ s.
The kinetic energy of the 15 balls will be greater than the kinetic energy of one ball .
None of the balls will have a velocity greater than 20 m /s .
9 answers
The correct answer is: None of the balls will have a velocity greater than 20 m/s.
Are you 100% sure
Yes, I am 100% sure. The conservation of momentum tells us that the total momentum of the system before the collision is equal to the total momentum after the collision. Therefore, the momentum of the single ball before the collision (which is mass times velocity) must be equal to the total momentum of the 15 balls after the collision. Since the 15 balls have a greater mass than the single ball, their velocity after the collision must be less than 20 m/s in order to conserve momentum. Therefore, none of the balls will have a velocity greater than 20 m/s.
Where do the forces that make atoms interact come from? (1 point) from the electric fields of charged molecules
from the electric fields of neutral subatomic particles
from the electric fields of neutral molecules
from the electric fields of charged subatomic particles
from the electric fields of neutral subatomic particles
from the electric fields of neutral molecules
from the electric fields of charged subatomic particles
The forces that make atoms interact come from the electric fields of charged subatomic particles.
Which is correct?
The correct answer is "from the electric fields of charged subatomic particles."
Are you 100% sure?
Yes, I am 100% sure. The fundamental forces that govern the interactions between subatomic particles, including those that make up atoms, are the electromagnetic force, the weak force, the strong force, and the gravitational force. Among these forces, the electromagnetic force is the one responsible for interactions between charged subatomic particles, such as protons and electrons. The electromagnetic force is carried by charged particles called photons, and it can be attractive or repulsive depending on the charges of the interacting particles. Therefore, the forces that make atoms interact come from the electric fields of charged subatomic particles.