« previous next »

Author Question: A radiation detector measures radioactivity decay of a piece of radium by catching and counting ... (Read 27 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?

On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

Did you know?

Human kidneys will clean about 1 million gallons of blood in an average lifetime.

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

Did you know?

Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

Did you know?

Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

Photosynthetically active radiation (PAR) diminishes substantially with passage through the canopy o Photosynthetically active radiation (PAR) diminishes substantially with passage through the canopy o
(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, ...
Signs and Symptoms of Radiation Exposure Signs and Symptoms of Radiation Exposure
Types of Radioactive Decay Types of Radioactive Decay
The sum of which decay reactions could convert 209Tl to 205Tl? The sum of which decay reactions could convert 209Tl to 205Tl?
My Shamrock Counting Book 2023 My Shamrock Counting Book 2023
Video: Effect of blood chemistry - stimuli, hyperventilation response and hypoventilation response

For a complete list of videos, visit our video library