Explanation:
v = wavelength x frequency
330 = 5 . 10-² m x f
f = 6600 Hz
the frequency that human can hear is about 20 Hz - 20000 Hz
so human can hear the note.
Answer:
Heat is transferred from the fire through the wire by conduction.
Explanation:
here's your correct answer.. please copy it..
The cannon is 17.69 m above the ground level
<h3>Data obtained from the question</h3>
The following data were obtained from the question:
- Horizontal speed (u) = 333 m/s
- Horizontal distance (s) = 622 m
- Height (h) =?
<h3>How to determine the time </h3>
We'll begin by calculating the time taken for the ball to land on the ground. This can be obtained as follow:
- Horizontal speed (u) = 333 m/s
- Horizontal distance (s) = 622 m
- Time (t) =?
s = ut
622 = 333 × t
Divide both sides by 333
t = 622 / 333
t = 1.9 s
<h3>How to determine the height</h3>
The height of the cannon above the ground can be obtained as illustrated below:
- Acceleration due to gravity (g) = 9.8 m/s²
- Time (t) = 1.9 s
- Height (h) =?
h = ½gt²
h = ½ × 9.8 × 1.9²
h = 4.9 × 3.62
h = 17.69 m
Learn more about motion under gravity:
brainly.com/question/20385439
#SPJ1
Answer:
The direction of induced emf is revered and hence the direction of the induced current.
Explanation:
If the polarity of the magnet is reversed, the direction if the field lines through the solenoid is also reversed, which according to Faraday's law means
in other words, the direction of the magnetic flux is revered, and therefore, the direction of the induced emf is also revered.
Furthermore, according to Ohm's law
which tells us that if the induced emf changes sign <em>(is reversed)</em>
the direction of the induced current is also reversed.
