J. Henry Alston was the first African American to publish his research findings on the perception of heat and cold in a major US psychology journal. Please select the best answer from the choices provided T F

True

Explanation:

J. Henry Alston was known as a famous African American psychologist. He was known through his thorough study of the sensations of heat and cold.

He thereby became the first African American to publish his research findings on the perception of heat and cold in a major US psychology journal and was an important figure in the field.

276 days

Explanation:

P.S - the exact question is -

To find  - Determine the amount of time for polonium-210 to decay to one fourth its original quantity. The  half-life of polonium-210 is 138 days. Please show all work.

Proof -

Given that , The  half-life of polonium-210 is 138 days

⇒ Amount of polonium -210 to decay to   of its original quantity  = 138 days

Now,

Amount of polonium to decay to next    = 138 days

∴ we get

Total Amount of polonium -210 to decay to   of its original quantity  =138 + 138 days

                                                                                                   = 276 days

⇒Total amount of time for polonium-210 to decay to one fourth its original quantity = 276 days.