From left, a lens labeled 1 flat on the left and convex on the right, a thick lens labeled 2 double convex, a lens labeled 3 convex on the right and slightly concave on the left, a lens labeled 4 flat on the left and concave on the right, a lens labeled 5 concave on both left and right, a thin lens labeled 6 double convex.
Which lenses are convex? Check all that apply.

1
2
3
4
5
6

radiation

explanation:

heat is transmitted by radiation

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.

a skateboard rolling across the street - apex