« previous next »

Author Question: A beam of 1-MeV gamma rays incident on a piece of 0.50-cm thick lead is reduced by 50 of its initial ... (Read 62 times)

RRMR

  • Hero Member
  • *****
  • Posts: 557
on: Jul 28, 2018
A beam of 1-MeV gamma rays incident on a piece of 0.50-cm thick lead is reduced by 50 of its initial value. How thick must the lead be to reduce the beam to one percent of its initial value?
 a. 1.1 cm
  b. 2.2 cm
  c. 3.3 cm
  d. 4.4 cm
  e. 8.4 cm

Question 2

At which latitude is the noonday Sun overhead only once a year?
 a. 10S
  b. 23S
  c. 4N
  d. 30N


steff9894

  • Sr. Member
  • ****
  • Posts: 337
Reply #1 on: Jul 28, 2018
Answer to Question 1

c

Answer to Question 2

d


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

A Piece of Mars on Earth A Piece of Mars on Earth
Blood Agar Plate- gamma hemolysis Blood Agar Plate- gamma hemolysis
Anxiety model. Stressful events lead to symptoms of anxiety, which can be resolved by coping ... Anxiety model. Stressful events lead to symptoms of anxiety, which can be resolved by coping ...
The coagulation cascade. Both the intrinsic pathway and extrinsic pathway lead to a common pathway ... The coagulation cascade. Both the intrinsic pathway and extrinsic pathway lead to a common pathway ...
Reflection of light rays Reflection of light rays
In a room where g = 9.81 m/s2, a hockey puck slides off the edge of a platform with an initial ... In a room where g = 9.81 m/s2, a hockey puck slides off the edge of a platform with an initial ...
Video: Barriers - eye structures, digestive mucosa, respiratory mucosa & genitourinary mucosa

For a complete list of videos, visit our video library