Awoman runs a 5k race in 30 minutes. calculate her average velocity

Asystem containing an ideal gas at a constant pressure of 1.22×10^5 pa gains 2140 j of heat. during the process, the internal energy of the system increases by 2320 j. what is the change in volume of the gas?

Explain what happens at the saturation point when adding salt to water at room temperature.

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?