Search results
Results From The WOW.Com Content Network
The Kawasaki Heavy Industries & CRRC Qingdao Sifang T251 (Contract Turnkey 251) is the first generation electric multiple unit rolling stock in operation on the Thomson–East Coast line of Singapore's Mass Rapid Transit (MRT) system, manufactured by a consortium of Kawasaki Heavy Industries (KHI) and CRRC Qingdao Sifang (formerly CSR Qingdao Sifang) under Contract T251.
Hafnium is a chemical element; it has symbol Hf and atomic number 72. A lustrous , silvery gray, tetravalent transition metal , hafnium chemically resembles zirconium and is found in many zirconium minerals .
Natural hafnium (72 Hf) consists of five observationally stable isotopes (176 Hf, 177 Hf, 178 Hf, 179 Hf, and 180 Hf) and one very long-lived radioisotope, 174 Hf, with a half-life of 3.8 × 10 16 years. [2] In addition, there are 34 known synthetic radioisotopes, the most stable of which is 182 Hf with a half-life of 8.9 × 10 6 years.
The Sd.Kfz. 251 (Sonderkraftfahrzeug 251) half-track was a World War II German armoured personnel carrier designed by the Hanomag company, based on its earlier, unarmored Sd.Kfz. 11 vehicle. The Sd.Kfz. 251 was designed to transport the Panzergrenadier (German mechanized infantry ) into battle.
Solid HF consists of zig-zag chains of HF molecules. The HF molecules, with a short covalent H–F bond of 95 pm length, are linked to neighboring molecules by intermolecular H–F distances of 155 pm. [4] Liquid HF also consists of chains of HF molecules, but the chains are shorter, consisting on average of only five or six molecules. [5]
The hafnium controversy was a debate over the possibility of "triggering" rapid energy releases, via gamma-ray emission, from 178m2 Hf, a nuclear isomer of hafnium. The energy release per event is 5 orders of magnitude (100,000 times) higher than in a typical chemical reaction, but 2 orders of magnitude less than a nuclear fission reaction.
In a handover orchestrated under the ceasefire deal that came into effect on Jan. 19, Hamas was supposed to return the bodies on Thursday of Bibas along with her two slain sons, Ariel, 4, and Kfir ...
PNS Zulfiquar (FFG-251) is the lead ship of the F-22P Zulfiquar-class guided missile frigates since 2009. [5] She was designed and constructed by Chinese firm, Hudong-Zhonghua Shipbuilding in Shanghai , for the Pakistan Navy .