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Author Question: Approximately how many states in the range from 5.0 eV to 5.2 eV are there in a copper bar of volume ... (Read 58 times)

penguins

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on: Jul 29, 2018
Approximately how many states in the range from 5.0 eV to 5.2 eV are there in a copper bar of volume 5.3 cm3?
 
  (h = 6.626  10-34 J  s, h = 1.055  10-34 J  s, mel = 9.11  10-31 kg, 1 eV = 1.60  10-19 J)
  A) 1.6  1022 B) 5.1  1022 C) 3.2  1022 D) 8.2  1021 E) 3.2  1021

Question 2

A straight wire that is 0.60 m and carrying a current of 2.0 A is placed at an angle with respect to the magnetic field of strength 0.30 T. If the wire experiences a force of magnitude 0.
 
  18 N, what angle does the wire make with respect to the magnetic field?
  A) 25 B) 35 C) 30 D) 60 E) 20


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jackie

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

A

Answer to Question 2

C


penguins

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

kusterl

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

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