Copper is the best material
The triangle <span>in the first law of thermodynamics, represents energy that moves from a hot object to a cooler object.</span>
Answer:
the glass contains air bubbles that expands and contracts as the glass is heated or froze. when they expand they may cause the glass to break or even explode
Generally speaking, negative ions increase the flow of oxygen to the brain resulting in higher alertness, decreased drowsiness, and more mental energy.
B)
Doppler effect is about the apparent change in frequency. The change in pitch heard as an ambulance approaches you is an example of this