A cube of copper 2.00cm on a side is suspended by a string. The cube is heated with a burner from 20.0°C to 90.0°C. The air surrounding the cube is at atmospheric pressure (1.01×10^5Pa).

a. The increase in volume of the cube.
b. The mechanical work done by the cube to expand against the pressure of the surrounding air.
c. The amount of heat added to the cube.
d. The change in internal energy of the cube.

a. 2.856 x 10^-6 m³

b. 0.288 J

c. 971.88 J

d. 971.592 J

Explanation:

d) The change in internal energy of the cube.

Note: For Copper -

B(beta)= 5.1 × 10^-3 (C)^-1

Cp = 390J/Kg.K

p (Rho) = 8.90 × 10³Kg/m³

Detailed solution is attached below

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.