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Home Q & A Board Science-Related Homework Help Physics Astronomy
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bah1234 bah1234
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6 years ago
An ac signal of a certain frequency is applied to a capacitor. The current leads the voltage by 90.
 
  Indicate whether the statement is true or false

Question 2

If originally there were X atoms of radioactive isotope present and now there are only X/16 atoms, how many half-lives have elapsed?
 
  A) 4
  B) 1
  C) 2
  D) 3

Question 3

Describe the differences between secular and diffuse reflection.
 
  What will be an ideal response?

Question 4

A fighter plane moving 200 m/s fires a projectile with speed 50 m/s in a forward direction. The projectile makes an angle of 30 with the direction of the plane's motion.
 
  What is the speed of the projectile with respect to a stationary observer on the ground? A) 293 m/s
  B) 243 m/s
  C) 268 m/s
  D) 250 m/s
  E) 281 m/s
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sdfaffsdfaff
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6 years ago
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bah1234 Author
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#2
6 years ago
Brilliant
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