<span>You need to find the path difference. That is, how much further must sound waves from the more distant speaker travel than the close speaker, to reach the mike.
Use Pythagoras to find the distance of the further speaker: it is √(2.00²+4.50²)=4.924m so the path difference is 4.924-4.50=0.424m.
You will get constructive interference when this path difference is an integer number of wavelengths, because the waves will arrive at the mike in phase.
The speed of sound is 340m/s so the lowest frequency that will produce an antinode at the mike is the one that makes 0.424=λ
v=fλ so f=v/λ
f=340/0.424=801Hz.
The next one will be when 0.424m = 2λ => λ=0.212m
f=340/0.212=1602Hz
and so-on according to f=340n/0.424 where n is an integer.
For destructive interference the path difference must be (n-½)λ because that will make the waves arrive at the mike 180° out of phase.
f=340(n-½)/0.424</span>
Answer:
yes
Explanation:
The metal is closer than 20 cm to the magnet which is in the magnetic field.
For the object that has a horizontal velocity component of 6 m/s and a vertical velocity component of 4 m/s we have:
1. The velocity of the object is 7.21 m/s.
2. The angle it makes with the horizontal is 33.7°.
1. The velocity of the object can be found as follows:
Where:
: is the horizontal component of the velocity = 6 m/s
: is the vertical component of the velocity = 4 m/s
Hence, the <u>velocity is</u>:
2. The angle it makes with the <u>horizontal </u>can be calculated with the following trigonometric function:
Where:
θ: is the angle it makes with the horizontal
Therefore, the <u>angle is</u>:
You can learn more about the components of the velocity here: brainly.com/question/2285233?referrer=searchResults
I hope it helps you!
Answer:
V = 1.41 m /s
Explanation:
Movement in both wood board and boy is created by internal forces . No horizontal external force acts on them . So conservation of momentum will apply on both of them for movement in horizontal direction.
Mass of wood board x velocity = mass of boy x velocity
58.1 x V = 48.3 x 1.69
V = 1.41 m /s
Answer:
17640
Explanation:
Power = workdone/time
Power = (force x displacement)/time
Power = (mg x 60)/60
Power = (1800 x 9.8 x 60)/60
=> power = 17640 watt
