Liquid metal imbalance of the surface tension induces a pressure difference between the rear and the head, which produces a thrust to drive the droplet toward the head; at the same time, the hydrogen produced in the electrochemical reaction process also further raises the thrust. The discovery of this phenomenon laid the technical foundation for the development of intelligent motors, vascular robots, fluid pumping systems, flexible actuators and even more complex liquid metal robots. Liquid metal Liquid metal consists of alloys with very low melting points which form a eutectic that is liquid at room temperature. The standard metal used to be
External debt of India for the last two quarters is compiled and published by the Ministry of Finance. The Government of India also publishes an annual status report on the debt which contains detailed statistical analysis of the country's external debt position. As on 31 December 2017, India’s external debt stock totalled US$ 513.4 billion, a quarter-over-quarter increase of 8.8%. The composition pattern of India's external debt is noted below. Long-term borrowings (more than a year to maturity) dominate India's external debt. India classifies its long-term external debt into seven heads. The external debt column notes the value of external debt stock outstanding at