Examlex
What is the Lorentz factor for an object moving at 0.85c?
Black Muslims
Members of the Nation of Islam, an African American political and religious movement founded in the United States in 1930, which aims to improve the spiritual, mental, social, and economic condition of African Americans.
Mid-1960s
A period in the 20th century characterized by significant social, political, and cultural changes, including the civil rights movement and the escalation of the Vietnam War.
Black Panthers
An African-American revolutionary party, founded in 1966, that advocated for the defense of African-American communities from state oppression and police brutality.
Capitalist System
An economic system where trade, industry, and the means of production are largely or entirely privately owned and operated for profit, guided by market forces.
Q11: On average, we expect that _ stars
Q39: Calculate the main-sequence lifetimes of the following
Q45: Which of the following have both been
Q45: Which of the following would be the
Q55: You observe a reddish galaxy with stars
Q57: Outline the basic scenario of formation and
Q58: The one property of a main-sequence star
Q81: The figure below depicts the evolution in
Q87: Spiral arms are<br>A) solid features.<br>B) clumps of
Q96: The figure below depicts helium fusion in