« previous next »

Author Question: A radiation detector measures radioactivity decay of a piece of radium by catching and counting ... (Read 102 times)

SAVANNAHHOOPER23

  • Hero Member
  • *****
  • Posts: 542
on: Jul 29, 2018
A radiation detector measures radioactivity decay of a piece of radium by catching and counting alpha particles it emits. Making this measurement affects the
 
  A) radiation rate of the piece of radium.
  B) alpha particles that are caught and counted.
  C) both of these
  D) neither of these

Question 2

What is the focal length of the combined lenses with individual powers of 8.0 diopters and 4.0 diopters?
 
  A) 8.0 cm
  B) 5.6 cm
  C) 6.0 cm
  D) 8.3 cm
  E) 4.0 cm


mcomstock09

  • Sr. Member
  • ****
  • Posts: 377
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: B

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

SAVANNAHHOOPER23

  • Hero Member
  • *****
  • Posts: 542
Reply #2 on: Jul 29, 2018
TY


mcomstock09

  • Sr. Member
  • ****
  • Posts: 377
Reply #3 on: Jul 29, 2018
You're welcome


« previous next »
 

Did you know?

Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

Did you know?

Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

The four ways in which animals exchange heat with the environment are radiation, evaporation, convec The four ways in which animals exchange heat with the environment are radiation, evaporation, convec
The sparse plasma (blue) and dust (white) in the tail of comet Hale–Bopp are being The sparse plasma (blue) and dust (white) in the tail of comet Hale–Bopp are being
Electromagnetic Radiation Chart Electromagnetic Radiation Chart
Using a gauge that measures vacuum in units of inches of water to test the vacuum at the dipstick ... Using a gauge that measures vacuum in units of inches of water to test the vacuum at the dipstick ...
How to solve an exponential decay problem involving first order decay How to solve an exponential decay problem involving first order decay
Ocean sediment cores preserve a record of ice sheet growth and decay Ocean sediment cores preserve a record of ice sheet growth and decay
Video: Mechanism of enzyme action

For a complete list of videos, visit our video library