Answer:
the oscillations of the electrons must be in the 10⁸ Hz = 100 MHz range
Explanation:
The speed of a wave of radio, television, light, heat, all are manifestations of electromagnetic waves that are oscillations of electric and magnetic fields that support each other, the speed of all these waves is the same and the vacuum is equal to c = 3 108 m / s
All waves have a relationship between the speed of the wave, its frequency and wavelength
c = λ f
f = c /λ
for this case lam = 1 m
f = 3 10⁸/1
f = 3 10⁸ Hz
the oscillations of the electrons must be in the MHz range
It should be clarified that the speed of light in air is a little lower
n = c / v
v = c / n
the refractive index of vacuum is n = 1 and the refractive index of air is n = 1.000002
Answer:
the new ppresure 1.89 10⁵ Pa
Explanation:
In this case we assume that the air is compiled as an ideal gas, which is described by the expression
P V = nR T
Where P is the pressure and T is the absolute temperature, let's write this expression for the two points that tell us
P1 = (nR / V) T1
P1 / T1 = nR / V
P2 = (nR / V) T2
P2 / T2 = nR / V
With the constant on the right side is the same we can match the two equations
P1 / T1 = P2 / T2
Let's take the tempera to absolute
T1 = 35.0 + 273.15
T1 = 308.15K
T2 = -40.0 + 273.15
T2 = 233.15K
Let's clear and calculate the pressure (P2)
P2 = P1 T2 / T1
P2 = 2.50 10⁵ 233.15 / 308.15
P2 = 1.89 10⁵ Pa
Answer:
Neither the source or wall is moving so the sound takes 3 sec to get to the wall and 3 sec to return
D = 3 * v = 330 m/s * 3 sec = 990 m
Answer:
C. 500 watts
Explanation:
power is defined as the rate of work done
When a force causes a object to move, work is being done on the object by the force.