Examlex
A source at rest emits light of wavelength 500 nm.When it is moving at 0.90c away from an observer, the observer detects light of wavelength:
Fourteenth Amendment
An amendment to the United States Constitution, adopted in 1868, that granted citizenship and equal civil and legal rights to African Americans and formerly enslaved people.
Citizenship
Citizenship refers to the status of being a legally recognized subject or national of a state, with specific rights and duties.
Freedmen
Individuals who have been released from slavery or bondage, often used in the context of the emancipated slaves in the United States after the Civil War.
Congressional Elections
The process by which members of the United States Congress, including both the House of Representatives and the Senate, are elected by the voters in their respective constituencies.
Q9: If the kinetic energy of a free
Q23: Color is carried by:<br>A)only quarks<br>B)only leptons<br>C)only quarks
Q27: The quantum number n is most closely
Q31: A meter stick moves in the direction
Q41: Evidence for the wave nature of matter
Q43: What discovery in 1998 changed our understanding
Q50: Hubble's law is evidence that:<br>A)the speed of
Q52: In order to obtain a single-slit
Q56: A consequence of Einstein's theory of relativity
Q78: The potential energy of a magnetic dipole