freesyria1965 freesyria1965

15-05-2018
Chemistry

contestada

A radioactive sample is 555 years old. It’s half life is 111 years. How many half lives?

Respuesta :

24-05-2018

Given: Age of sample = 555
Half life = 111

So, number of half life = [tex] \frac{\text{Age of sample}}{\text{half life}} [/tex]
= [tex] \frac{555}{111} [/tex]
= 5

Thus, number of half life of radioactive sample is 5

Answer Link

Otras preguntas

Help Please Choose the equation that represents the graph below: A.) y = −2x − 4 B.) y = 2x + 4 C.) y = −2x + 4 D.) y = 2x − 4

If you are involved in any type of collision, it is important you

Simplify 7N - 2N + 3P + 2P. (a) 5N + 5P (b) 10N + 10P (c)10NP

Which of the following is NOT a characteristic of a desert ecosystem dry and hot dry and cold few plants grow here covers one-half of the earth

In Figure 15-1, cool air is more dense and forces up ____________________ air.

The table shows the position of a cyclist. t (seconds) 0 1 2 3 4 5 s (meters) 0 1.6 5.5 10.6 17.1 24.9 (a) Find the average velocity for each time perio

A. 1/4 B. 0 C. 2/6 Subtract

What is the meaning of the prefix un-? (a)above (B)not (C)under (D)over

A character faces conflict because the community rejects her. What type of conflict is this?

What statement is an inference about the odyssey. A. King Alcinous was likely thankful that Odysseus defeated the cyclops. B. Odysseus taunted the cyclops after