This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: The half-life of a radioactive material is 4.5 days. How many days are required for a sample, with ... (Read 70 times)

big1devin

  • Hero Member
  • *****
  • Posts: 583
on: Jul 29, 2018
The half-life of a radioactive material is 4.5 days. How many days are required for a sample, with an initial activity of 1.0  105 Bq, to decay to an activity of 100 Bq?
 
  A) 45 days
  B) 36 days
  C) 54 days
  D) 31 days

Question 2

What frequency must a photon have to change the energy of a hydrogen atom from the n = 2 to the n = 4 state? (h = 6.626  10-34 J  s, 1 eV = 1.60  10-19 J)
 
  A) 3.06  1014 Hz
  B) 6.16  1014 Hz
  C) 4.11  1014 Hz
  D) 5.20  1014 Hz
  E) 9.24  1014 Hz
Physics ¦ Walker ¦ 5th Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

kaykay69

  • Sr. Member
  • ****
  • Posts: 322
Reply #1 on: Jul 29, 2018
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 29% of students answer this correctly


big1devin

  • Member
  • Posts: 583
Reply 2 on: Jul 29, 2018
Wow, this really help

nanny

  • Member
  • Posts: 313
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Did you know?

A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.

Did you know?

Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

The life cycle of HIV The life cycle of HIV
The Scale of Life 1 The Scale of Life 1
Sample Stress Management Program Sample Stress Management Program
Life cycle of Obelia, a hydrazoan that has alternating medusa (left) and polyp generations Life cycle of Obelia, a hydrazoan that has alternating medusa (left) and polyp generations
Life cycle of a conifer (pine) Life cycle of a conifer (pine)
Nils Hoffmann feat. Dustin Tebbutt - Next Life Nils Hoffmann feat. Dustin Tebbutt - Next Life
Video: Photosynthesis and Van Helmont Experiment

For a complete list of videos, visit our video library