The diagram shows a skydiver at different points of her jump. At what point would her acceleration be greatest?
A.
B.
C.
D.

Could someone . i have tried to solve myself but my calculation is off

At what time will the interfering waves have an amplitudeof zero?

What belongs in the areas marked x and y? x: the internal energy of a piston system increases as heat is added and rises to a cool area y: as thermal energy is added to a container, some of the energy is lost to the environment x: as thermal energy is added to a container, some of the energy is lost to the environment y: the internal energy of a piston system increases as heat is added and rises to a cool area x: a cold spoon placed in hot liquid gets warmer y: thermal energy is converted to light energy x: thermal energy is converted to light energy y: a cold spoon placed in hot liquid gets warmer