En una competición de tiro con arco, la diana de 80 cm de diámetro se encuentra a 50 m de distancia y a 1,5 metros del suelo. En uno de los tiros la flecha sale a 230 km hora con una de 3,5 grados desde una altura de 1,60 metros, despreciando el rozamiento con el aire.¿ Impactará la flecha en la diana? En caso afirmativo¿ con qué velocidad y en qué dirección?

Electroplating is a way to coat a complex metal object with a very thin (and hence inexpensive) layer of a precious metal, such as silver or gold. in essence the metal object is made the cathode of an electrolytic cell in which the precious metal cations are dissolved in aqueous solution. suppose a current of 480.ma is passed through an electroplating cell with an aqueous solution of agno3 in the cathode compartment for 46.0 seconds. calculate the mass of pure silver deposited on a metal object made into the cathode of the cell. round your answer to 3 significant digits. also, be sure your answer contains a unit symbol. ×10μ

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?