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Author Question: For a period after June 21 for locations above 23 N, sunrise in the conterminous United States ... (Read 47 times)

viki

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For a period after June 21 for locations above 23  N, sunrise in the conterminous United States occurs ______________ each day.
 Fill in the blank(s) with correct word

Question 2

Wave frequency is inversely proportional to
 a. amplitude.
  b. period.
  c. wave velocity.
  d. all of these.

Question 3

A pure sample of 226Ra contains 2.0  1014 atoms of the isotope. If the half-life of 226Ra = 1.6  103 years, what is the decay rate of this sample? (1 Ci = 3.7  1010 decays/s)

Question 4

The flat, distorted maps of the world are ______________.
 Fill in the blank(s) with correct word

Question 5

Which of the following characterize(s) a wave?
 a. Wavelength
  b. Amplitude
  c. Period
  d. All of these

Question 6

Homer says that we can safely use nuclear power because all radioactive nuclei are gone after two half-lives. Marge says that only the decay rate is zero after two half-lives. Which one, if either, is correct, and why?
 a. Homer, because half of the nuclei disintegrate in each half-life.
  b. Marge, because the number of decays per unit time is halved in each half-life.
  c. Homer, because it's safe to handle radioactive substances after two half-lives.
  d. Both, because when all nuclei disintegrate the decay rate is also zero.
  e. Neither, because one quarter of the nuclei are left after two half-lives.

Question 7

The International Date Line is a theoretical line following approximately the ______________ meridian.
 Fill in the blank(s) with correct word

Question 8

A quantity of ideal gas in a rigid container has a pressure of 1.00  106 Pa at 0C. If the pressure is increased to 1.75  106 Pa, what is the temperature of the gas after this is done?



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Athena23

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Answer to Question 1

later

Answer to Question 2

b

Answer to Question 3

7.4  108 Ci

Answer to Question 4

(Mercator) projections

Answer to Question 5

d

Answer to Question 6

e

Answer to Question 7

180

Answer to Question 8

204.75C




viki

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  • Posts: 525
Reply 2 on: Jul 29, 2018
Wow, this really help


ttt030911

  • Member
  • Posts: 315
Reply 3 on: Yesterday
Excellent

 

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