What is the SI unit of radioactivity?
Answer
Becquerel
The well runs deep
Trivia questions and answers, drawn fresh from the well
83,401 public questions across 1,329 topics. Challenge yourself, or build the perfect quiz for game night.
83,401
Questions with answers
1,329
Topics to explore
3
Depths of difficulty
Today at the well
1 / 5 0
Which French physicist discovered radioactivity in 1896?
Answer
Henri Becquerel
0 / 5
Round complete
83,401 trivia questions
Every question has an answer
1,329 public topics
Something for every quiz
Free to explore
Reveal answers at your own pace
Fresh from the well
Latest trivia questions
Which type of radiation is stopped by a sheet of paper?
Answer
Alpha radiation
In what year did the Curies discover radium?
Answer
1898
What element did Marie Curie name after her homeland Poland?
Answer
Polonium
Which French physicist discovered radioactivity in 1896?
Answer
Henri Becquerel
What type of star did Hubble use to measure the expansion rate of the universe?
Answer
Cepheid variables
Which instrument was primarily used for the Hubble Deep Field observations?
Answer
Wide Field and Planetary Camera 2
Which institute conducts Hubble's science operations?
Answer
Space Telescope Science Institute
Which Hubble instrument replaced the COSTAR system in 2009?
Answer
Cosmic Origins Spectrograph
How long did the Hubble Ultra Deep Field exposure take?
Answer
1 million seconds
What type of celestial object did Hubble observe to discover cosmic acceleration?
Answer
Type Ia supernovae