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Brews & Views Bulletin Board Service * Brews and Views Archive 2005 * Archive through May 05, 2005 * Another Ideal SRM question for Bill P. < Previous Next >

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Greg Beron
Intermediate Member
Username: Gberon

Post Number: 378
Registered: 03-2003
Posted on Wednesday, April 27, 2005 - 07:44 pm:   Edit Post Delete Post View Post/Check IP    Ban Poster IP (Moderator/Admin only)

Bill, I'm writing a brief note about calculating Ideal SRM for my monthly newsletter (giving your BYO article as the source and recommending buying the issue). But there's one thing I'm not clear on. Is the formula 0.14 * RA + 5.2 to be calculated as (0.14*RA)+5.2? Or is it 0.14*(RA+5.2)? You get quite different results depending on how you do the math. For example (014*100)+5.2= 19.2 while 0.14*(100+5.2)= 14.7

Thanks for your help.
Greg Beron
Culver City Home Brewing Supply
www.brewsupply.com
 

Hophead
Senior Member
Username: Hophead

Post Number: 1434
Registered: 03-2002
Posted on Wednesday, April 27, 2005 - 08:26 pm:   Edit Post Delete Post View Post/Check IP    Ban Poster IP (Moderator/Admin only)

According to my distant memories of basic mathematics, * has priority over +, so it would be "(0.14*RA)+5.2".
 

Jon Tupper
Junior Member
Username: Jon_up_north

Post Number: 33
Registered: 04-2005
Posted on Wednesday, April 27, 2005 - 08:29 pm:   Edit Post Delete Post View Post/Check IP    Ban Poster IP (Moderator/Admin only)

Hophead is correct. Multiplication, division, roots, and exponentials first followed by addition and subtraction.
 

robert rulmyr
Advanced Member
Username: Wacobob

Post Number: 545
Registered: 02-2003
Posted on Wednesday, April 27, 2005 - 08:57 pm:   Edit Post Delete Post View Post/Check IP    Ban Poster IP (Moderator/Admin only)

It's crystal clear now! Is that an SRM = 0?
 

Chris Colby
Intermediate Member
Username: Chriscolby

Post Number: 313
Registered: 03-2003
Posted on Wednesday, April 27, 2005 - 09:04 pm:   Edit Post Delete Post View Post/Check IP    Ban Poster IP (Moderator/Admin only)

Yep, in the absence of parenthesis, multiplication and division take precendence over addition and subtraction.


Chris Colby
Bastrop, TX
 

Greg Beron
Intermediate Member
Username: Gberon

Post Number: 379
Registered: 03-2003
Posted on Wednesday, April 27, 2005 - 11:31 pm:   Edit Post Delete Post View Post/Check IP    Ban Poster IP (Moderator/Admin only)

Thanks to all. My initial assumption was that the multiplication should come first, but I thought I'd better double-check.
Greg Beron
Culver City Home Brewing Supply
www.brewsupply.com