A piston absorbs 25 J of heat from its surroundings while expanding from 0.0003 m² to 0.0006 m3 at a constant pressure of 1.0 x 105 Pa. What are the
correct values for heat and work for the piston?
A. Q = -25 J, W = +30 J
B. Q = +25 J, W = -30 J
O
O
C. Q = +25 J, W = +30 J
O D. Q = -25 J, W = -30 J

seeing the graph would

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.

3. dark matter

empty space could also be a simple vacuum