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Author Question: When an earthquake occurs, no direct _______________ pass through the core to register on ... (Read 122 times)

Wadzanai

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on: Jul 27, 2018
When an earthquake occurs, no direct _______________ pass through the core to register on seismographs on the opposite side of Earth.
 
  Fill in the blank(s) with correct word

Question 2

Because of the period-luminosity relation for Cepheids and RR Lyrae variable stars, astronomers are able to _____
 
  a. determine the relationship between the period of pulses and luminosity
  b. measure the mass of a star
  c. calculate a star's diameter
 d. determine the chemical composition of a Type I Cepheid
 e. narrow their study to eclipsing binary stars only


sailorcrescent

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Reply #1 on: Jul 27, 2018
Answer to Question 1

S waves

Answer to Question 2

a


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Wadzanai

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Reply #2 on: Jul 27, 2018
Both answers were spot on, thank you once again


sailorcrescent

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Reply #3 on: Jul 27, 2018
Great! Please up vote :D


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