Modern Physics Basics

Which fundamental force is primarily responsible for the attraction between protons and electrons?

• strong

• gravitational

• electromagnetic

• weak

Which type of fundamental force overcomes the repulsive, electrostatic force between protons in the nucleus of an atom?

• the gravitational force

• the weak force

• the strong force

• the magnetic force

The total conversion of 1.00 kilogram of the sun’s mass into energy yields

• 9.31 × 10² MeV

• 3.00 × 10⁸ J

• 8.38 × 10¹⁹ MeV

• 9.00 × 10¹⁶ J

Tags

NGSS.HS-PS3-1

A baryon made out of two u quarks and one d quark (uud).

• a. proton

• b.neutron

• c.lambda

• d.omega

A baryon made out of two d quarks and one u quark (udd).

• a.proton

• b. neutron

• c. lambda

• d.omega

The four fundamental forces of nature are: 

• Electromagnetism, Gravity, Strong Nuclear, Weak Nuclear
• Gravity, Strong Nuclear, Weak Nuclear, Medium Nuclear
• Normal Force, Force due to gravity, Magnetism, Nuclear 
• Nuclear, Electricity, Gravity, Atomic 

The splitting of a nucleus into smaller nuclei is

• fusion
• fission
• decay
• gamma radiation

Minimum frequency at which radiation causes the ejection of electrons from a metal

• stimulated emission
• photoelectric effect
• threshold frequency
• polarization

This image is an illustration of

• photoelectric effect
• Dalton's atomic theory
• Bohr model
• Quantum mechanical model

How many protons does Uranium have?

• 92

• 238

• 146

• it can change