While sitting in your car by the side of a country road, you are approached by your friend, who happens to be in an identical ca
1 answer:
Answer:
7.85m/sec
Explanation:
definition of terms
<em>speed of sound is 340m/s</em>
<em>sound is an example of wave source</em>
<em>speed is change in distance per time</em>
Perceived frequency of friend's horn = 266Hz.
beat=f1-f2
6=f1-260 Hz
f1=266Hz.
we make an assumption that the velocity of sound will be used, I will adopt 340m/sec.
=340m/sec.
(340 x 266/260)- 340 = 7.85m/sec
my friend will be approaching me at that speed
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Answer:
magnitude: 21.6; direction: 33.7 degrees
Explanation:
When we multiply a vector by a scalar, we have to multiply each component of the vector by the scalar number. In this case, we have
vector: (-3,-2)
Scalar: -6
so the vector multiplied by the scalar will have components
The magnitude is given by Pythagorean's theorem:
and the direction is given by the arctan of the ratio between the y-component and the x-component:
The component of the force in negative z-direction is -0.144 N.
The given parameters;
- <em>current in the wire, I = 2.7 A</em>
- <em>length of the wire, L = (3.2 i + 4.3j) cm</em>
- <em>magnetic filed, B = 1.24 i</em>
The force on the segment of the wire is calculated as follows;
where;
- <em>θ is the angle wire and magnetic field</em>
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The force on the wire segment will be perpendicular in negative z-direction (applying right hand rule), so there won't be any x and y component of the force.
The angle between the wire and the magnetic field is calculated as follows;
The magnitude of the wire length is calculated as follows;
The component of the force in negative z-direction is calculated as;
Thus, the component of the force in negative z-direction is -0.144 N.
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