levivader1063 levivader1063

18-03-2019
Advanced Placement (AP)

contestada

A radioactive isotope has a half-life of 40 years and a radioactivity level of 4 curies. How many years will it take for the radioactivity level to become 0.25?

Respuesta :

anikaraisa04 anikaraisa04

18-03-2019

it will take 160 years. >.<

Answer Link

Otras preguntas

Lesson 6.5 Assignment - Proportions in Triangles

Describe the parental cross you received; use genetic symbols.

5. Name the following molecules.

After each page who singles to the picture of the mountain balls and strikes the better has

10mL of 6.0 M HCl solution is diluted with water to volume of 50mL. What’s the molarity of the new solution?

The mass of a proton is 1.67 x 10-27 kg. We have one proton fixed to the ground, and we want another proton to hover above it, which means its weight and its el

A 4-year-old girl presents to the clinic for a routine check-up. The nurse practitioner reviews her growth chart and notes a consistent pattern over the past ye

The body needs more calories per pound of body weight for ______ than it does for ______. 1) maintenance; growth 2) growth; maintenance 3) catabolism 4) anaboli

Is this the correct capitalization? The play, Much Ado About Nothing, will be directed by Mrs. Cortez at the Town Lake YMCA.

Suggest a reasonable explanation for each of the following observations a. The rate of reaction for the saponification (basic hydrolysis of ethyl trifluoroaceta