Answer:
Its a ceramic
Explanation:
Brick does not contain any metal so it couldnt be an alloy.
<h2>Answer: Medium
</h2>
The medium is the main factor that differentiates a mechanical wave from an electromagnetic wave, since the first can not propagate without its existence, while the second can propagate regardless of whether the medium exists or not.
In addition, it is the medium that will define, the propagation speed of the wave, according to its specific physical characteristics.
Therefore, the <u>correct answer</u> is a.
Answer:
4186 Joules
Explanation:
The specific heat capacity of a substance is defined as the amount of heat needed to raise the temperature of 1 kg of the substance by 1 Kelvin. In formula,

where
Q is the amiunt of heat needed
m = 1 kg is the mass

is the variation of temperature of the substance
For water, the specific heat capacity is
. This means that the heat energy required to raise 1 kg of water by 1 K is exactly 4186 J.
Answer:
These are called isotopes.
Explanation:
Please mark brainliest and have a great day!