Answer:
At different times
Explanation:
The echo returns at different times, but faster in water. This is because water particles are bound closer and this makes them transmit vibration energy from one particle to the next quickly. An echo is a sound wave and sound waves are longitudinal waves that occur by the collision of particles to move the vibrations along, and this is why they move slower in air.
True, laboratory examination may narrow the origin of such evidence to a group of persons that includes the suspect.
More about laboratory examination:
Scientists examine the evidence gathered from crime sites, suspects, and sufferers in crime laboratory. They can examine everything, including DNA, biometrics, human body parts, and questionable objects.
Numerous labs have seen increased responsibilities as a consequence of the increasing reliance on scientific approaches in criminal investigations. By narrowing their procedures and offering up-to-date training, NIJ is committed to assisting crime laboratories in growing their capacity to keep up with technological advancements in crime solving.
Learn more about the laboratory here:
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Answer:
yes?
Explanation:
One could say that a black man being elected president could be liberation for the civil rights movement. African Americans finally having the opportunity to be seen in public office. Their opinions and beliefs being valued at a presidential level just the same as a white man. The civil rights movement was a movement for African Americans to have equal rights and opportunities as non African Americans. I'm sure Barack Obama being president could uplift the minority since they have been working fruitlessly for that opportunity. An opportunity that is but a human right for African Americans to have equal opportunity in their country.
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Answer: A.
scale
Explanation: Scales are mostly used to compare and contrast, like balancing scale, or a scale from the amount of people in America and in another country.
The analyst
is determining the direction of the public opinion. By understanding the direction
of the public opinion, an analyst will find which position does the majority of
people hold into. The direction could be a positive or a negative direction.
