99060944 99060944

15-10-2022
Biology

contestada

What is half life?

1. the amount of time it takes for half of an atom's electrons to decay
2. the amount of time it takes for some of a radioactive substance to decay
3. the amount of time it takes for half of a radioactive substance to decay
4. the amount of time it takes for all of a radioactive substance to decay

Respuesta :

Otras preguntas

Read the passage. The wind sang to them softly, as the couple watched a sunset blossom like a rose unfolding across the sky. They thought it was the most specia

What are the values of x and y?

What is the value of g? 18g+7=g

(Economics) This list describes recent events in a country. As you read the list, think about the role of the country’s central bank. The country has seen its G

In the figure, lines m and n are parallel to each other. Lines p and q are also parallel to each other. What is the value of x? A. 40° B. 80° C. 100° D. 180°

9. Which of these is equal to {2 - 31}{21 +4}?

Henrietta, the owner of a very successful hotel chain in the Southeast, is exploring the possibility of expanding the chain into a city in the Northeast. She in

What is 4/5 x 2/5? I need help

i need help with this please

i’m helping one of u can guys can help,or try your best!