Answer:
(A) A pitch that is higher than the pitch actually produced
Explanation:
Doppler effect
<span>In chemical reaction, atoms
always are rearranged. They are never destroyed or created because it would
contradict the law of conservation of energy. The law of conservation of energy
states that energy can neither be created nor destroyed, but can change from
one form to another. Also it cannot be neutralized. Resulting in one cannot be
part of a chemical reaction. An example of this is the reaction HCl + NaOH
-> NaCl + H2O. the reactants and products are not created, they are just
formed into another substance.</span>
Answer:
The first flowering plants appeared in the Mesozoic era, not the Paleozoic era
Explanation:
The Mesozoic era is well known and most famous because of the rule of the dinosaurs which were the dominant animals for most of this are. Also, it is the era in which the mammals appeared, though they lived in the shadows of the dinosaurs and only became dominant after their extinction. Another important evolution that took place and is not mentioned very often is the appearance of the first flowering plants. This was a revolutionary trait for the plants, and it helped them to survive in the changing climate on Earth. Soon this trait enabled this type of plants to spread out significantly and to become one of the most dominant organisms on the planet in the following era.
Answer:
C
Explanation:
Gravity will always be attractive because it pulls things not push. For example gravity pull people to earth, that is why we don't float.