Modern Physics

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

• Weak

• Strong

• Electromagnetic

• Gravitationa

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

• The magnetic force

• The gravitational force

• The weak force

• The strong force

What is the mass of an antineutron in kilograms?

• -1.67 x 10 ^-27 kg

• 1.67 x 10 ^-27 kg

• +1 u

• -1 u

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

• 9.31 × 10² MeV

• 3.00 × 10⁸ J

• 9.00 × 10¹⁶ J

• 8.38 × 10¹⁹ MeV

The picture is about....

• Photo-electric efect

• light reflective experimen

• X-ray diffraction

• Michelson-Morley Experiment

How many quarks make up a proton?

• 1

• 2

• 3

• 4

Name given for the particles that have the same mass but all other properties are opposite.

• .anti-matter

• dark matter

• annihilate

• anti-particle

A particle that is made out of quarks is

• Boson

• Meson

• Hadron

• Lepton

Two objects exerting a gravitational force on one another change position. Instead of being 100 meters apart, they are now 200 meters apart. Compared to the original force the new force will be

• 1/2 the original

• 1/4 the original

• twice a great

• four time a great

There is a ball 'A' shares a gravitational force with bowling ball 'B'. If no other factor were to change EXCEPT 'B's mass were to double, the new force would be

• Twice the original

• four time the original

• 1/2 as great

• 1/4 as great