Modern Physics Test (B)

What does 1.00794 stand for?

• Hydrogen

• atomic number

• atomic mass

• atomic explosion

A particle that moves around the nucleus is called an _________.

• Proton

• Neutron

• Electron

• Quark

Isotopes are atoms that have the same number of protons but a different number of _____________.

• neutrons

• electrons

• atoms

Two isotopes of Beryllium would not have the same number of which subatomic particle?

• nucleus

• electrons

• neutrons

• protons

Changing which subatomic particle changes the mass AND the charge?

• proton
• neutron
• electron

Compared to clocks in a stationary reference frame, moving clocks run

• faster

• slower

• at the same rate

When you approach a light source, the light from that source has a speed

• greater than c.

• less than c.

• equal to c.

We do not usually observe relativistic effects in our daily lives because

• we are moving at speeds much less than c.

• we are much larger than atoms.

• we are much heavier than elementary particles.

• we are much lighter than stars.

Mass and energy can be converted into one another.

• True

• False

If two events appear to occur at the same time to one person, do they have to be simultaneous to someone else?

• No, they do not have to be simultaneous to someone else.

• It depends on the events.

• Yes, they have to be simultaneous to someone else.

• No, they have to be sequential to someone else.