The best and most correct answer among the choices provided by your question is the fourth choice or letter D. <span>Someone who studies the physics of sound waves is an acoustician.</span><span>
</span>A scientist who works in the field of acoustics is an acoustician<span> while someone working in the field of acoustics technology may be called an acoustical engineer.
I hope my answer has come to your help. Thank you for posting your question here in Brainly.
</span>
Answer:
it decreases because of the differences in hormones
A. inertia
Because it has to do with the motion of something, especially if it changes its pace. In this example, the book's motion, when sliding on the table, decreased because of less force being given off from the student.
Answer:
An object may become extinct due to the lack of quantity of the object and the object no longer exists so it is now extinct.
<h3>
Answer:</h3>
20 seconds
<h3>
Explanation:</h3>
<u>We are given</u>;
- Power of the engine as 400 watts
- Force as 100 N
- Distance the object is lifted up as 80 m
We are required to determine the time taken.
- We need to know that power is the rate of work done
Therefore;
But, work done = Force × distance
Work done = 100 N × 80 m
= 8000 Joules
- Since , Power = Work done ÷ time
Then, time = Work done ÷ Power
Thus;
Time = 8000 J ÷ 400 W
= 20 s
Therefore, the time taken by the engine to lift the object is 20 seconds
