onlinechannel19.php:   Energy loss in a hydraulic jump based on sequent depths The hydraulic jump Formula:     (y2 - y1)3 E = ________________     4 y1 y2 INPUT DATA: Select:    SI units (metric) U.S. Customary units Upstream depth y1:   Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel19.php on line 132 Downstream depth y2:   Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel19.php on line 141 OUTPUT: Energy loss E:    Warning: Undefined variable $energyloss in /var/www/html/ponce/onlinechannel19.php on line 151 Deprecated: substr(): Passing null to parameter #1 ($string) of type string is deprecated in /var/www/html/ponce/onlinechannel19.php on line 151 Warning: Undefined variable $lengthunits in /var/www/html/ponce/onlinechannel19.php on line 151   Your request was processed at  11:00:17 pm on April 3rd, 2025   [ 250403  23:00:17 ]. Thank you for running onlinechannel14.php.   Please call again.   [151210]