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how do i get an empty line in my flashcard

0

card{begin{flushleft}



In 1897, J.J. Thomson "discovered" the electron by measuring the charge-to-mass ratio of "cathode rays" (actually,streams of electrons, with charge q and mass m) as follows:



\ \ (a)First he passed the beam through uniform crossed electric and magnetic field $vec{E}$ and $vec{B}$ mutually perpendicular, and both of them perpendicular to the beam), and adjusted the electric field until he got zero deflection. What, then, was the speed of the particles (in terms of E and B)? \ \ 



(b) Then he turned off the electric field, and measured the radius of curvature, R, of the beam, as deflected by the magnetic field alone. In terms of E, B, and R, what is the charge-to-mass ratio (q/m) of the particles? 



end{flushleft} }{Problem 5.1}



ok this is my code. I get the error that there is no line to end. and then i do not get an empty line between the intro and a, and between a and b.



What am 

line-breaking

share

edited 5 mins ago

Johannes_B

21k351205

asked 9 mins ago

DanielvanheuvenDanielvanheuven

1

New contributor

Danielvanheuven is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Welcome to TeX.SX. Have you considered reading an introduction to LaTeX? You cannot use double backslashes to add empty lines in the output.
  
  – Johannes_B
  4 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  welcome to tex.se! that we can help you and understand what is your problem, please extend your code fragment to complete small document beginning with documentclass{...} and ending with end{document}.
  
  – Zarko
  4 mins ago
  

  
  
  
  

add a comment | 

0

card{begin{flushleft}



In 1897, J.J. Thomson "discovered" the electron by measuring the charge-to-mass ratio of "cathode rays" (actually,streams of electrons, with charge q and mass m) as follows:



\ \ (a)First he passed the beam through uniform crossed electric and magnetic field $vec{E}$ and $vec{B}$ mutually perpendicular, and both of them perpendicular to the beam), and adjusted the electric field until he got zero deflection. What, then, was the speed of the particles (in terms of E and B)? \ \ 



(b) Then he turned off the electric field, and measured the radius of curvature, R, of the beam, as deflected by the magnetic field alone. In terms of E, B, and R, what is the charge-to-mass ratio (q/m) of the particles? 



end{flushleft} }{Problem 5.1}



ok this is my code. I get the error that there is no line to end. and then i do not get an empty line between the intro and a, and between a and b.



What am 

line-breaking

share

edited 5 mins ago

Johannes_B

21k351205

asked 9 mins ago

DanielvanheuvenDanielvanheuven

1

New contributor

Danielvanheuven is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Welcome to TeX.SX. Have you considered reading an introduction to LaTeX? You cannot use double backslashes to add empty lines in the output.
  
  – Johannes_B
  4 mins ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  welcome to tex.se! that we can help you and understand what is your problem, please extend your code fragment to complete small document beginning with documentclass{...} and ending with end{document}.
  
  – Zarko
  4 mins ago
  

  
  
  
  

add a comment | 

card{begin{flushleft}



In 1897, J.J. Thomson "discovered" the electron by measuring the charge-to-mass ratio of "cathode rays" (actually,streams of electrons, with charge q and mass m) as follows:



\ \ (a)First he passed the beam through uniform crossed electric and magnetic field $vec{E}$ and $vec{B}$ mutually perpendicular, and both of them perpendicular to the beam), and adjusted the electric field until he got zero deflection. What, then, was the speed of the particles (in terms of E and B)? \ \ 



(b) Then he turned off the electric field, and measured the radius of curvature, R, of the beam, as deflected by the magnetic field alone. In terms of E, B, and R, what is the charge-to-mass ratio (q/m) of the particles? 



end{flushleft} }{Problem 5.1}



ok this is my code. I get the error that there is no line to end. and then i do not get an empty line between the intro and a, and between a and b.



What am 

line-breaking

share

edited 5 mins ago

Johannes_B

21k351205

asked 9 mins ago

DanielvanheuvenDanielvanheuven

1

New contributor

Danielvanheuven is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

card{begin{flushleft}



In 1897, J.J. Thomson "discovered" the electron by measuring the charge-to-mass ratio of "cathode rays" (actually,streams of electrons, with charge q and mass m) as follows:



\ \ (a)First he passed the beam through uniform crossed electric and magnetic field $vec{E}$ and $vec{B}$ mutually perpendicular, and both of them perpendicular to the beam), and adjusted the electric field until he got zero deflection. What, then, was the speed of the particles (in terms of E and B)? \ \ 



(b) Then he turned off the electric field, and measured the radius of curvature, R, of the beam, as deflected by the magnetic field alone. In terms of E, B, and R, what is the charge-to-mass ratio (q/m) of the particles? 



end{flushleft} }{Problem 5.1}



ok this is my code. I get the error that there is no line to end. and then i do not get an empty line between the intro and a, and between a and b.



What am 

share

edited 5 mins ago

Johannes_B

21k351205

asked 9 mins ago

DanielvanheuvenDanielvanheuven

1

New contributor

Danielvanheuven is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share

edited 5 mins ago

Johannes_B

21k351205

asked 9 mins ago

DanielvanheuvenDanielvanheuven

1

New contributor

Danielvanheuven is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

edited 5 mins ago

Johannes_B

21k351205

edited 5 mins ago

Johannes_B

21k351205

asked 9 mins ago

DanielvanheuvenDanielvanheuven

1

New contributor

Danielvanheuven is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 9 mins ago

DanielvanheuvenDanielvanheuven

1