chasebrown232 chasebrown232

15-08-2019
Geography

contestada

If a substance has a half-life of 10 million years, what fraction of the atoms
remain after 20 million years?

Respuesta :

gstahovec gstahovec

15-08-2019

answer is 1/4 of the atoms

at 0 years it would be the full amount (X)

at 10 million years you have half: X/2

at 20 million years you have 1/4 because: (X/2)/2 will equal 1/4

Answer Link

tejshree0829 tejshree0829

10-04-2021

Answer: 1/4

Explanation:

Answer Link

Otras preguntas

True or false? The molar mass of a gas determines the amount of kinetic energy of the gas.

Joe's dog has a mass of 28,000 grams. What is the mass of Joe's dog in kilograms?

an argument A) includes emotions B include an ethical concern C) is based on logic D provides a complete answer

Possums ___ death in order to deceive predators in search of live prey. a. circumspect b. excavate c. feign d. orbit

Carter negotiated peace between Egypt and Israel. is this true or false?

why is "and" on this poem "to the doctor who treated the raped baby and who felt such despair is repeated?

The goals of the Safety Office of the Department of Transportation include______. a. keeping records for cars b. assistance in emergencies c. administering t

Maggie has 20 ribbons. 2/5 of the ribbons are polka-dotted ribbons. How many ribbons are not polka - dotted?

What is mental math?

philosophy that attempts to combine different systems of beliefs or practices