The answer is:
d.It’s a composite because it’s a mixture of cement, sand, and other granular pieces.
The explanation:
Concrete is a composite, since it is composed of various elements like sand, gravel & water.
Aggregate consists of large chunks of material in a concrete mix, generally a coarse gravel or crushed rocks such as limestone, or granite, along with finer materials such as sand. Cement, most commonly Portland cement, is associated with the general term "concrete.
parabolic motion
vertically upwards ⇒ α = 90°⇒sin 90° = 1
Answer: I’m sorry I cannot understand the problem
Explanation:
Gravitational I think would be the answer, Hope this helps!