An insulated piston-cylinder device contains 200 L of air at 249 kPa and 25 °C. A paddle wheel rotates until the temperature is 480 °C. During the process, the pressure is keeping constant. Determine the work done by the paddle wheel (kJ). Use property tables to solve the problem.

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

What type of energy do chemical bonds have? what type of energy is it converted to during chemical reactions? question 15 options: chemical bonds have kinetic energy, which is converted to potential energy during chemical reactions. chemical bonds have electric energy, which is converted to potential energy during chemical reactions. chemical bonds have heat energy, which is converted to kinetic energy during chemical reactions. chemical bonds have potential energy, which is converted to heat energy during chemical reactions.

Which class of molecules functions as chemical signals? hormones water carbohydrates proteins