This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Glass panes are opaque to a certain type of radiation, which can cause sunburn. What type of ... (Read 52 times)

sc00by25

  • Hero Member
  • *****
  • Posts: 596
on: Jul 28, 2018
Glass panes are opaque to a certain type of radiation, which can cause sunburn. What type of radiation is it? This radiation is important in ozone layer reactions.
 a. gamma
  c. X-ray
  b. ultraviolet
  d. microwave

Question 2

You stand by the railroad tracks as a train passes by. You hear a 950-Hz frequency when the train approaches, which changes to 820 Hz as it goes away. How fast is the train moving? The speed of sound in air is 340 m/s.
 a. 14.0 m/s
  c. 25.0 m/s
  b. 20.0 m/s
  d. 37.8 m/s


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ErinKing

  • Sr. Member
  • ****
  • Posts: 362
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

C


sc00by25

  • Member
  • Posts: 596
Reply 2 on: Jul 28, 2018
:D TYSM

sultana.d

  • Member
  • Posts: 320
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

All patients with hyperparathyroidism will develop osteoporosis. The parathyroid glands maintain blood calcium within the normal range. All patients with this disease will continue to lose calcium from their bones every day, and there is no way to prevent the development of osteoporosis as a result.

Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

Did you know?

Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

A black impact socket. Always use an impact-type socket whenever using an impact wrench to avoid ... A black impact socket. Always use an impact-type socket whenever using an impact wrench to avoid ...
The operation of a rotor-type oil pump. The operation of a rotor-type oil pump.
Gerotor-type oil pump driven by the crankshaft. Gerotor-type oil pump driven by the crankshaft.
Signs and Symptoms of Radiation Exposure Signs and Symptoms of Radiation Exposure
Try an afternoon glass of cold grape juice for a refreshing break Try an afternoon glass of cold grape juice for a refreshing break
A diver shines light up to the surface of a flat glass-bottomed boat at an angle of 30 relative ... A diver shines light up to the surface of a flat glass-bottomed boat at an angle of 30 relative ...
Video: Fetal Development of the Cardiovascular System

For a complete list of videos, visit our video library