How much heat is absorbed by a 45g iron skillet when its temperature rises from 6oc to 21oc?

Explanation:

The heat (thermal energy) absorbed by the iron skillet can be found using the following equation:

  (1)

Where:

is the heat

is the mass of the element (iron in this case)

is the specific heat capacity of the material. In the case of iron is

is the variation in temperature

Knowing this, lets rewrite (1) with these values:

 (2)

Finally:

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.

you can cut your hand off if your not