It is proposed to have a water heater that consists of an insulated pipe of 5-cm diameter and an electric resistor inside. cold water at 20°c enters the heating section steadily at a rate of 30 l/min. if water is to be heated to 55°c, determine (a) the power rating of the resistance heater (b) the average velocity of the water in the pipe.

Ms. hidalgo opens the door to her classroom. her classroom is 60 degrees and the air outside is 80. predict what will happen using your knowledge of how heat flows.

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius

On a horizontal frictionless surface, a small block with mass 0.200 kg has a collision with a block of mass 0.400 kg. immediately after the collision, the 0.200 kg block is moving at 12.0 m/s in the direction 30° north of east and the 0.400 kg block is moving at 11.2 m/s in the direction 53.1° south of east. use coordinates where the +x-axis is east and the +y-axis is north.(a) what is the total kinetic energy of the two blocks after the collision (in ) what is the x-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your ) what is the y-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your answer.)