Termometría. Las temperaturas iniciales de m gramos del líquido A, 2m gramos del líquido B y 3m gramos del líquido C son respectivamente 30° C, 20°C y 10°C; mezclando los líquidos A y B la temperatura final es 25°C; mezclando los líquidos B y C, la temperatura final es 14,5°C. ¿Cuál será la temperatura final si se mezclan los líquidos A y C? Desprecia la capacidad calorífica del calorímetro y supóngase que no hay reacciones químicas durante la mezcla de líquidos.

3. a worker pushes a 30.5 kg polished stone along a polished table with a force on bonin a straight line for 5.20 s after starting from rest. there is no friction between thestone and the table. at the end of the table. the stone is hooked to a cable with a lengthof 62.0 cm to rotate it to a rough table to store until they can be picked up. the roughtable has a coefficient of static friction 0.702 with the polished stone. remember that 8= 9.80 m/s2a) what is the speed of the stone when it is hooked to the cable? b) what is the tension in the cable while the stone is rotating? (there is still nofriction)c) how much force is needed to make the stone begin sliding from rest on therough table? ius = 0.70262.0 cm30.5 kg20.5 kg6= 0