How do mechanical waves compare with electromagnetic waves? Select all that apply. Look at picture!!

The pressure, volume, and temperature of a mole of an ideal gas are related by the equation pv = 8.31t, where p is measured in kilopascals, v in liters, and t in kelvins. use differentials to find the approximate change in the pressure if the volume increases from 14 l to 14.6 l and the temperature decreases from 375 k to 370 k. (round the answer to two decimal places.)

The long handle on a rake is a(n) a. lever b. screw c. wedge d. inclined plane

Anybody wanna ? (picture included? )