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Home Q & A Board Science-Related Homework Help Physics Astronomy
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dixoncsk2062 dixoncsk2062
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6 years ago
Vector = 4.00 m points eastward and vector = 3.00 m points southward. The resultant vector + is given by
 
  A) 5.00 m at an angle 36.9 south of east.
  B) 5.00 m at an angle 53.1 south of east.
  C) 5.00 m at an angle 71.6 south of east.
  D) 5.00 m at an angle 18.4 south of east.
  E) 5.00 m at an angle 26.6 south of east.

Question 2

A sound source departs from a stationary observer. The frequency heard by the observer is
 
  A) higher than the source.
  B) lower than the source.
  C) the same as that of the source.
  D) equal to zero.
  E) impossible to predict.

Question 3

The radioactive isotope 131I (atomic number 53 ) decays to the isotope 131Xe (atomic number 54). What type of radioactive decay is this?
 
  A) electron capture
  B) electron ionization
  C) beta decay
  D) alpha decay

Question 4

When discharging a battery, the terminal voltage is ________ the battery emf.
 
  A) more than
  B) less than
  C) equal to
  D) zero, as is

Question 5

What is the cosine of 55?
 
  A) 0.6
  B) 0.57
  C) 0.574
  D) 0.5736
  E) 0.57360
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StevenSteven
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dixoncsk2062 Author
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6 years ago
Above and beyond my expectations for this site
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