« previous next »

Author Question: A sound level of 19 dB is how many times as intense as one of 10 dB? a. 8 b. 9 c. 3 d. ... (Read 31 times)

fox

  • Hero Member
  • *****
  • Posts: 540
on: Jul 28, 2018
A sound level of 19 dB is how many times as intense as one of 10 dB?
 a. 8
  b. 9
  c. 3
  d. 18

Question 2

An energy of 13.6 eV is needed to ionize an electron from the ground state of a hydrogen atom. Selecting the longest wavelength that will work from the those given below, what wavelength is needed if a photon accomplishes this task?
 a. 60 nm
  b. 80 nm
  c. 70 nm
  d. 90 nm
  e. 40 nm


canderson530

  • Sr. Member
  • ****
  • Posts: 317
Reply #1 on: Jul 28, 2018
Answer to Question 1

a

Answer to Question 2

d


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Did you know?

Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

Did you know?

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

Did you know?

Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

How the study of genomes and proteomes can provide us with connections to different biological level How the study of genomes and proteomes can provide us with connections to different biological level
Auscultation. The stethoscope is pressed against the body wall to listen for sound waves associated Auscultation. The stethoscope is pressed against the body wall to listen for sound waves associated
Stand in a doorway and hook your fingertips on both sides about chest level or lower. Stand in a doorway and hook your fingertips on both sides about chest level or lower.
Egg Cooking Times Egg Cooking Times
The Nile Delta will be strongly affected by a rise in sea level of 50 cm The Nile Delta will be strongly affected by a rise in sea level of 50 cm
Sustainable Food Systems Are Environmentally Friendly, Economically Sound, and Socially Equitable Sustainable Food Systems Are Environmentally Friendly, Economically Sound, and Socially Equitable
Video: Muscle Fatigue and Recovery

For a complete list of videos, visit our video library