1- El ácido sulfúrico reacciona con el cinc a 20 ºC y 1 atm de presión. Calcula la masa de sulfato de cinc que se forma y el volumen de hidrógeno que se obtiene. S: 97, 2 g de Ag

Astring that is fixed at both ends has a length of 1.05 m. when the string vibrates at a frequency of 91.0 hz, a standing wave with five loops is formed. (a) what is the wavelength of the waves that travel on the string? (b) what is the speed of the waves? (c) what is the fundamental frequency of the string?

Alow cost, low earth orbit (leo) satellite is to be fabricated at a university, for subsequent launch by rocket. what are the constraints and objectives for selection of a material suitable for the satellite bus (i.e. the structure)? explain each in brief. (15 marks) b)suggest sources of data which could support the selection of materials for applications in space. (5 marks) c) set weights for the objectives listed in (2a) using the digital logic method. (5 marks)

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body