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Science-Related Homework Help Physics Topic started by: bigt246823 on Feb 23, 2018



Title: Who, in 1925, postulated that matter, as well as light, has properties of both waves and particles? ...
Post by: bigt246823 on Feb 23, 2018
Who, in 1925, postulated that matter, as well as light, has properties of both waves and particles?
 a. Planck
  b. Heisenberg
  c. de Broglie
  d. Einstein



[Ques. 2] Which of the following is true about a diode?
 a. A diode causes the voltage to shift in phase by 90, i.e., a right angle.
  b. A diode has high resistance in one current direction and low resistance in the opposite current direction.
  c. A diode can only be used with a transformer.
  d. All filter circuits contain a diode.
  e. All of the above.



[Ques. 3] The name of which astronomer is most closely linked with that of Ejnar Hertzsprung?
 a. Johannes Kepler
  b. Henrietta Leavitt
  c. Henry Russell
  d. Edwin Hubble



[Ques. 4] Matter waves were confirmed when it was found that electrons
 a. diffract.
  b. have a plus or minus spin quantum number.
  c. possess a negative charge.
  d. have mass.



[Ques. 5] In a parallel RLC circuit, where IR = IR, max sin(t), the current through the inductor, IL, is
 a. IL = IL, max sin(t).
  b. IL = IL, max sin(t).
  c. IL = IL, max cos(t).
  d. IL = IL, max cos(t).
  e. IL = IL, max tan(t).



[Ques. 6] The absolute magnitude of a celestial object is the apparent magnitude it would have if it were placed how far from the Earth?
 a. 10 parsecs
  b. 3.26 light-years
  c. 1 astronomical unit
  d. None of the above



[Ques. 7] As the speed of an object decreases, its wavelength
 a. remains unchanged.
  b. decreases.
  c. increases.
  d. is zero.



[Ques. 8] In a parallel RLC circuit, where IR = IR, max sin(t), the current through the capacitor, IC, is
 a. IC = IC, max sin(t).
  b. IC = IC, max sin(t).
  c. IC = IC, max cos(t).
  d. IC = IC, max cos(t).
  e. IC = IC, max tan(t).



[Ques. 9] The brightest planet has an apparent magnitude of about  4 and is named
 a. Jupiter.
  b. Saturn.
  c. Mars.
  d. Venus.



[Ques. 10] As the speed of an object increases, its wavelength
 a. remains unchanged.
  b. decreases.
  c. increases.
  d. is zero.


Title: Who, in 1925, postulated that matter, as well as light, has properties of both waves and particles? ...
Post by: oksanamad on Feb 23, 2018
1)  c

2)  b

3)  c

4)  a

5)  c

6)  a

7)  c

8)  d

9)  d

10)  b


Title: Who, in 1925, postulated that matter, as well as light, has properties of both waves and particles? ...
Post by: bigt246823 on Feb 23, 2018
I sincerely appreciate your time, great answers!


Title: Who, in 1925, postulated that matter, as well as light, has properties of both waves and particles? ...
Post by: oksanamad on Feb 23, 2018
Thank you for commenting back