Answer:
The direction of the magnetic field around the coil reverses. The force on the cone now pulls it back in. Repeatedly alternating the current direction makes the cone vibrate in and out. The cone vibrations cause pressure variations in the air, which are sound waves.
Explanation:So as it goes back and forth it makes a sound from the vibration.
Answer:
Picking between two possible alternatives:
✔ true/false
Showing an understanding of relationships between facts:
✔ matching
Discussing a topic from a personal perspective:
✔ short answer / essay
Demonstrating factual knowledge by eliminating wrong answers and selecting the correct one:
✔ multiple choice
Explanation:
I got it right on edge. have a good day!
Answer:
See the attached pictures for detailed answer.
Explanation:
See the attached pictures for explanation.
Answer:
We will see a waveform displayed on the screen and it will be PWM(pulse width modulation) of sinusoidal wave,this wave should have a frequency of 14KHz and it will form a vibration spectrum.
The total rate of energy emission is 2786.9 W.
<h3>Total Rate of Energy Emission</h3>
Radiation is a type of heat transfer where the heat energy is conveyed from photons or electromagnetic waves. The rate of energy emission can be calculated multiplying the Stefan–Boltzmann law (σ) by area (A). Therefore, you have:
Total Rate of Energy Emission (E)= σ, where:
σ = Stefan–Boltzmann constant =
A= area
T=temperature (K)
For solving this exercise, you should apply this formula. For your question:
σ = Stefan–Boltzmann constant =
A= 0.12 m²
T=527+273=800 K
Thus, the Total Rate of Energy Emission (E) will be:
E=σ
Read more about radiation heat transfer about:
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