A hot metal plate at 150°C has been placed in air at room temperature. Which event would most likely take place over the next few minutes? A. Molecules in both the metal and the surrounding air will start moving at lower speeds.
b. Molecules in both the metal and the surrounding air will start moving at higher speeds.
c. The air molecules that are surrounding the metal will slow down, and the molecules in the metal will speed up.
d. The air molecules that are surrounding the metal will speed up, and the molecules in the metal will slow down.

A

Explanation:

The molecules in both metal and surrounding air will start moving slower because of the sudden decrease in environment tmeperature. The thermal energy around the metal plate decreases, also decreasing the kinetic energy.

a. they are both space stations

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answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e