Understanding the Strong Nuclear Force

What particles are present in a helium nucleus?

• Two protons and two electrons

• Two neutrons and two electrons

• Two protons and two neutrons

• Two electrons and two protons

Which force tries to separate the protons in a nucleus?

• Nuclear force

• Magnetic force

• Gravitational force

• Electrostatic repulsion

What formula is used to calculate the electrostatic force between protons?

• Newton's law of gravitation

• Coulomb's law

• Ohm's law

• Hooke's law

What is the approximate value of the electrostatic force between two protons in a helium nucleus?

• 230 newtons

• 1.86 x 10^-34 newtons

• 6.67 x 10^-11 newtons

• 9.8 newtons

How does the gravitational force between protons compare to the electrostatic force?

• It is much stronger

• It is slightly stronger

• It is negligible

• It is equal

What is the role of the strong nuclear force in the nucleus?

• To balance gravitational forces

• To hold the nucleus together

• To attract electrons

• To repel protons

At what distance does the strong nuclear force become repulsive?

• Below 0.5 femtometers

• Above 3 femtometers

• At 1 femtometer

• At 2 femtometers

What is the range of distances over which the strong nuclear force is attractive?

• 5 to 10 femtometers

• 0 to 0.5 femtometers

• 0.5 to 3 femtometers

• 3 to 5 femtometers

What happens to the strong nuclear force at distances greater than 3 femtometers?

• It becomes gravitational

• It becomes stronger

• It becomes zero

• It becomes repulsive

Why is the strong nuclear force not noticeable in the macro world?

• It only affects electrons

• It is a type of magnetic force

• It is weaker than gravity

• It acts over very short distances