4. some kids are playing with a jump rope. they notice that they can
make transverse waves when they shake the rope up and down. they
shake it quickly and notice that the wave that forms appears to be
holding still. what type of wave interaction is this?
a. absorption
b. constructive interference
refraction
d. standing wave

1 a

2 b

3 b

4 d

5 d

6 d

explanation:

a coal burning power plant

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.