| | | The week in physics: 7–11 July | | | ADVERTISEMENT Pumps with LeakTight Safety Backup | Handling hazardous or expensive gases and vapors requires extra care. KNF LeakTight pumps offer ultralow leak rates of <6x10-6 mbar L/sec and a safety backup diaphragm, plus safeguards against intrusion contamination. Flow rates from 15–300 L/min. Options include explosion-proof motors and flow path material choices for chemical compatibility. Learn more. | | | | From the vault: January 1949 Televising science | A behind‐the‐scenes account of how a science show is telecast. | Roy K. Marshall | | | | | | © 2025 American Institute of Physics. | Physics Today 1 Physics Ellipse College Park, MD 20740-3842 +1 301 209 3100 | | |
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