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Author Question: A puck with a mass m1 = 28.0 g moving at 1.00 m/s approaches a stationary puck with a mass m2 = 102 ... (Read 93 times)

stock

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on: Jul 29, 2018
A puck with a mass m1 = 28.0 g moving at 1.00 m/s approaches a stationary puck with a mass m2 = 102 g on an air table and they undergo a two-dimensional elastic collision.
 
  As a result of their interaction, the incident puck moves away with a speed v1 = 0.785 m/s and the other puck moves away with a speed v2 in a different direction. What is the angle between the velocities v1 and v2? A) 45.0
  B) 90.0
  C) 85.0
  D) 123
  E) 165

Question 2

A Doppler weather radar operates at a frequency of 3.40 GHz. The wave from this radar system reflects from an approaching weather system moving with a speed of 39.0 m/s. What is the difference in frequency between the outgoing and returning waves?
 
  A) 442 Hz
  B) 351 Hz
  C) 419 Hz
  D) 322 Hz
  E) 670 Hz


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tkempin

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

D

Answer to Question 2

A


stock

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Reply 2 on: Jul 29, 2018
YES! Correct, THANKS for helping me on my review

scottmt

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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