Tienen un material desconocido donde una onda viaja a 1959 m/s, se encontro que dicho material tiene un módulo de Young de 7.6×10 10 Pa ¿Cual es la densidad del material en un Kg/m3?​

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

Which of the following are molecules? a. al b. ag c. mgcl2 d. nacl e. c3h8

Steel water aluminum think about the three words listed here. which word could be added as the title of this list of words to tell how these words are related? a) conductors b) heat c) insulators d) metals