« previous next »

Author Question: The decay rate of a radioactive sample decreases from 175 kBq to 12.4 kBq in 18.3 s. What is the ... (Read 29 times)

codyclark

  • Hero Member
  • *****
  • Posts: 538
on: Jul 29, 2018
The decay rate of a radioactive sample decreases from 175 kBq to 12.4 kBq in 18.3 s. What is the mean life (time constant) of this sample?
 
  What will be an ideal response?

Question 2

When monochromatic light illuminates a grating with 7000 lines per centimeter, its second order maximum is at 62.4. What is the wavelength of the light?
 
  A) 336 nm B) 752 nm C) 633 nm D) 452 nm E) 363 nm


frankwu0507

  • Sr. Member
  • ****
  • Posts: 322
Reply #1 on: Jul 29, 2018
Answer to Question 1

6.91 s

Answer to Question 2

C


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

codyclark

  • Hero Member
  • *****
  • Posts: 538
Reply #2 on: Jul 29, 2018
Both answers were spot on, thank you once again


frankwu0507

  • Sr. Member
  • ****
  • Posts: 322
Reply #3 on: Jul 29, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.

Did you know?

The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.

C, A nurse can also administer the medication by setting the dose and rate with an electronic infusi C, A nurse can also administer the medication by setting the dose and rate with an electronic infusi
Sample Exercise Prescription for Weight Training: Advanced Sample Exercise Prescription for Weight Training: Advanced
Sample Exercise Program for Healthy Older Adults (cont.) Sample Exercise Program for Healthy Older Adults (cont.)
(a) A turbidometry detector measures laser light directly across from the light source. The sample, ... (a) A turbidometry detector measures laser light directly across from the light source. The sample, ...
Sample of a weekly bookkeeping ledger. Sample of a weekly bookkeeping ledger.
Compute the rate of discount allowed on a rontor -tiller that lists for K 341 and is sold for K ... Compute the rate of discount allowed on a rontor -tiller that lists for K 341 and is sold for K ...
Video: Functional zones in a mitochondrion

For a complete list of videos, visit our video library