Answer:
The visible light frequency is 400 THz to 700 THz, approximately. A THz is a Terahertz, which is a unit of frequency equal to one trillion Hertz.
First one, for instance they become conductors or insulators depending on the temperature!
To develop this problem it is necessary to apply the concepts related to Sound Intensity.
By definition the intensity is given by the equation
Where,
I = Intensity of Sound
= Intensity of Reference
At this case we have that 15 engines produces 15 times the reference intensity, that is
And the total mutual intensity is 100 dB, so we should
Therefore each one of these engines produce D. 88dB.
Answer:
c. Sound travels slower than light.
Explanation:
We see any thing because of the light emitted or reflected by it. Whereas the sound is carried by the sound waves. The speed of light is more than the speed of sound. This is the reason the family saw the fireworks first and then heard the sound.
The same can be experienced during the sighting of a Jet plane or a rocket where, we see them way before we can hear the roaring sound of its engines.
The force on the charge is 1.1×10⁻⁸ N.
<h3>What is force?</h3>
Force can be defined as the product of the mass of a body and its acceleration
To calculate the force on the charge, we use the formula below.
Formula:
- F = qvBsin∅............. Equation 1
Where:
- q = charge
- v = velocity
- B = magnetic field
- ∅ = Angle.
From the question,
Given:
- B = 25 mT = 0.025 T
- v = 250 m/s
- q = 3.5 nC = 3.5×10⁻⁹ C
- ∅ = 30°
Substitute the given values into equation 1
- F = (0.025)(250)(3.5×10⁻⁹)(sin30°)
- F = 1.093×10⁻⁸ N
- F ≈ 1.1×10⁻⁸ N
Hence, the force on the charge is 1.1×10⁻⁸ N.
Learn more about force here: brainly.com/question/12970081
