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Author Question: A radioactive isotope of atomic number Z emits a beta-minus particle, and then the daughter nucleus ... (Read 71 times)

formula1

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on: Jul 29, 2018
A radioactive isotope of atomic number Z emits a beta-minus particle, and then the daughter nucleus emits a gamma ray. What is the atomic number of the resulting nucleus after both processes?
 
  A) Z - 3 B) Z + 1 C) Z - 2 D) Z - 1

Question 2

A child throws a ball with an initial speed of 8.0 m/s at an angle of 40 above the horizontal. The ball leaves her hand 1.0 m above the ground and experiences no appreciable air resistance as it moves.
 
  (a) How far from where the child is standing does the ball hit the ground? (b) How long is the ball in flight before it hits the ground? (c) What is the magnitude of the ball's velocity just before it hits the ground?


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ririgirl15

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Reply #1 on: Jul 29, 2018
Answer to Question 1

B

Answer to Question 2

(a) 7.5 m (b) 1.2 s (c) 9.1 m/s


formula1

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

mammy1697

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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