His average speed is 45 miles an hour
The question is: A tuning fork vibrates at 140 [Hz] and the wave emitted by it propagates with a speed of 340 m / s. Considering the above, it can be correctly stated that the wavelength of the wave emitted by the tuning fork is
Answer: Wavelength of the wave emitted by the tuning fork is 2.43 m.
Explanation:
Given: Frequency = 140 Hz
Speed = 340 m/s
wavelength = ?
Formula used to calculate the wavelength is as follows.

where,
= wavelength
v = speed
f = frequency
Substitute the values into above formula.

Thus, we can conclude that wavelength of the wave emitted by the tuning fork is 2.43 m.
Answer:
4.7 × 10⁵J
Explanation:
E = I * a * t
80% = 0.80
25cm = 0.25m
52cm = 0.52m
0.90h = 3240s
E = (0.80)(1400)(0.25 * 0.52)(3240)
= 4.7 * 10⁵J
Answer:
The correct answer might be
meters.
Explanation:
<u>The Answer Given might not be correct, I just did what my brain said.</u>
As the angle is perpendicular so Θ=90.
Putting this in the equation to calculate the magnetic force as:
F = evBsinΘ
F= evBsin90 *sin90 = 1 so,
F= evB.
Now when the electron will start to move in a circle, The necessary force that makes the electron rotate in a circle is given by Centripetal force.
So,
Magneteic Force = Centripetal Force
evB =
r =
......(1)
Now the problem is, We don't know " v " so we need to calculate velocity first,
Calculation of Velocity:
In order to calculate the velocity of electron, We should know the potiential difference with which the electrons are accelerated which in our case is 500ev. If "V" is the potiential difference, the energy gained by electrons during accelreation will be Ve. This appear as kinectic enrgy of electrons as,
K.E = Ve
m
= Ve
v =
................(2)
Putting value of velocity in equation 2 from 1:
r =



meters.
Answer:

Explanation:
magnetic flux is the count of magnetic field lines passing through a given loop or area
As we know that magnetic flux is given by the formula

here we also know that magnetic field B and plane of the coil is perpendicular in initial position
So the area vector is always perpendicular to the plane of the coil
so the angle between magnetic field and area vector is parallel to each other and this angle would be zero
so magnetic flux of the coil initially we have
