Title: Gramophone record.
Question: Why were 45s more popular with jukeboxes?

Title: Planck constant.
Question: Using Planck constant values from these effects would lead to what logical issue?

Title: The Bronx.
Question: How many Bronx residents called themselves "Sub-Saharan African" in 2009?

Title: Pain.
Question:
What theory perceives pain as being a specific sensation?