Ireally need ! : / which action best demonstrates the transformation of mechanical energy to heat energy and sound energy? a.) stretching a string b.) squeezing a sponge ball c.) throwing a ball upwards in air d.) striking a hammer on a nail

D

Explanation:
Let us examine the given actions to see which ones generate heat and sound energy from mechanical energy.

A) Stretching a string.
The mechanical stretching creates tension in the string, which is released when the tension is removed. The generation of thermal or sound energy is minimal or negligible.

B) Squeezing a sponge ball
The sponge ball experiences compressive loading. This generates minimal or no heat and sound energy.

C) Throwing a ball upwards in the air
Air friction generates minimal or no heat at low velocities. At low velocities the pressure waves are too small to generate sound.

D) Striking a hammer on a nail.
A tremendous amount of force is applied over a small area to generate very high stresses that are in the plastic zone. A high amount of thermal energy is generated and the localized disturbance of the air generates audible sound.
This is the correct situation.

Rocks made when, molten rocks cools and solidifies are known as igneous rocks. There are two kinds of igneous rocks:

1. Volcanic igneous rocks: These are formed when lava cools and solidifies on the surface of the Earth. These are also known as extrusive igneous rocks. These rocks cool faster than the Plutonic igneous rocks. Small mineral crystals are formed. These are fine-grained. These types of rock are composed of silica. Depending on different quantity of silica, these are known as Basalt, Andesites, Dacites, Rhyolite, Pumice and Obsidian.

2. Plutonic igneous rocks: These are formed when the magma cools and solidifies below the surface of Earth.  These are also known as intrusive igneous rocks. Since these rocks  have slow rate of formation, large mineral crystals are formed. These are coarse grained. These types of rock are composed of silica. Depending on different quantity of silica, these are known as Gabbro, Diorite, Granite and Pegmatite.