Exhibit 17-2
The figure below shows a sine wave on a string at one instant of time.
?
?
Use this exhibit to answer the following question(s).
Refer to . Which of the graphs below shows a wave where the wavelength is twice as large?
a.
d
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The electron orbiting the proton in the hydrogen atom is at a distance 
m. What is the ratio of the electric force to the gravitation force between these particles? (The mass of the proton is 1.67
kg and the mass of the electron is 
a. 
b. 
c. 
d. 
e. 
Hubble reveals the most distant (first) galaxies were bluer than those of today
Indicate whether the statement is true or false
The Sun produces energy by fusing hydrogen into helium
Indicate whether the statement is true or false
The ozone layer
a. reflects all EM waves. b. reflects high frequency radio waves. c. reflects low frequency radio waves. d. is responsible for the greenhouse effect. e. absorbs ultraviolet light in sunlight.