The threshold of hearing is a. 0 dB. b. 140 dB. c. 40 dB. d. 110 dB. e. 1 ...

Author Question: The threshold of hearing is a. 0 dB. b. 140 dB. c. 40 dB. d. 110 dB. e. 1 ... (Read 82 times)

melina_rosy

Hero Member
Posts: 531

on: Jul 28, 2018

The threshold of hearing is
a. 0 dB.
b. 140 dB.
c. 40 dB.
d. 110 dB.
e. 1 dB.

Question 2

An electron in a hydrogen atom makes a transition from the n = 4 to the n = 3 energy state. Determine the energy (in eV) of the emitted photon.
a. 0.54
b. 0.66
c. 0.85
d. 1.51
e. 10.2

carojassy25

Sr. Member
Posts: 299

Reply #1 on: Jul 28, 2018

Answer to Question 1

a

Answer to Question 2

b

Need homework help now?

Ask unlimited questions for free

Ask a Question

« previous next »

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Did you know?

When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.