¿Qué cantidad de aluminio a 20°C tendrá que agregarse a 400 gracias de agua caliente a 80°C para que la temperatura de equilibrio sea de 30°C?

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

Arope has one end tied to a vertical support. you hold the other end so that the rope is horizontal. if you move the end of the rope back and forth with a frequency of 4 hz, the transverse wave you produce has a wavelength of 0.5 m. what is the speed of the wave in the rope?

Acar tire rotates at a constant angular velocity of 3.5 rotations during a time interval of 0.75 seconds. what is the angular speed of the tire? in advance for any !