A calorimeter contains 1.25 kg of water at 21.5°C. A 0.15-kg block of an unknown substance at 65.5°C is placed in the water. The final temperature of the system is 22.0°C. What is the specific heat of the substance? What could the substance be? ​

Ascrew incorporates which other simple machine? lever wheel and axle inclined plane pulley

Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.

Una carga puntual de 3 x 10-6 c se coloca a 12 cm de una segunda carga puntual de - 1,5 x 10-6 c. calcular la magnitud fuerza eléctrica entre las cargas