« 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 26 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?

The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

Did you know?

Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Did you know?

The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.

Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Normal development of posture and spinal curves. (A) Toddler: Protruding abdomen; lumbar lordosis. ( Normal development of posture and spinal curves. (A) Toddler: Protruding abdomen; lumbar lordosis. (
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.
Examples of Basic-Level, Subordinate, and Superordinate Concepts Examples of Basic-Level, Subordinate, and Superordinate Concepts
Reaction 7: The First Substrate-Level Phosphorylation Reaction 7: The First Substrate-Level Phosphorylation
Front Panel on Sound Box of the Great Lyre with Bull’s Head Front Panel on Sound Box of the Great Lyre with Bull’s Head
Rapid sea level rise Rapid sea level rise
Video: Appendicitis Animation

For a complete list of videos, visit our video library