Answer:
Mac’s Speed = 2.5 m/s
Tosh’s Speed = 4 m/s
Tosh moves 1.5 m/s faster than Mac.
Explanation:
Tosh starts from an initial position of 12m and in a span of 3 seconds, (1.00 seconds to 4.00 seconds) he moves 12 meters.
So his speed is distance / time
s = 12 / 3
s = 4 m/s
Mac starts from an initial position of 2m and in a span of 4 seconds, he traveled 10m (2.00m to 12.00m).
Speed = Distance / time
s = 10 / 4
s = 2.5 m/s
B. It is inversely proportional to the square of the distance of the listener from the source.
C. It is directly proportional to the square of the distance between the listener from the source.
D. It is inversely proportional to the distance between the listener from the source.
Answer : The correct option is, (B)
Explanation :
There is a direct relation between the loudness of sound and the intensity of sound.
..........(1)
where,
L = loudness of sound
I = intensity of sound
= intensity of reference
From this we conclude that the loudness is directly proportional to the intensity of the sound.
There is an indirect relation between the intensity of sound and the distance of the listener from the source.
...................(2)
From this we conclude that the intensity of sound is inversely proportional to the square of the distance of the listener from the source.
From equation (1) and (2) we conclude that the loudness of sound is inversely proportional to the square of the distance of the listener from the source.
Hence, the correct option is, (B)
Answer:
1. motor
2. electricity
Explanation:
A motor uses electromagnetism or electricity and magnetism to create motion. A motor converts electric energy into mechanical energy.
On the other hand, the reverse process of using motion and magnetism will create electricty. It will convert the mechanical energy to electrical energy. And the machine that does it is called a generator.
c. controlling
b. manipulated
d. dependent