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riadik2000 [5.3K]
3 years ago
11

AM signals travel as changes in?

Physics
1 answer:
gtnhenbr [62]3 years ago
3 0
It definitely changes in frequency. For example if the frequency is medium the signals change after the sunset and it changes in the ionosphere cause medium frequency travels in the skywave. 
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A man stands out at the end of the diving board, which is supported by two springs a and b, each having a stiffness of k = 15 kn
igor_vitrenko [27]
<span>Answer: The spring force at A and B can be obtained directly by summing moments_aJx)ut points B and A. respectively. (+ IM, = 0; F A (1)- 392.4(3) =0 F A = 1 177.2 N C+ 1M a = 0; F, (1) -392.4(4) = 0 F, = 1569.6 N Spring Formula : Applying A = - , we have Inn I S , A a = - 1 . 177 ' -- = 0.07*48 m A, = 156 ~ = 0. 10464 ra x 15(103) 15(103) Geometry : The angle of tilt a is a - tan' 1 ^ 0.10464 + 0.07848 1 10.4° v * F Z te</span>
8 0
4 years ago
Se colocan tres objetos, muy cerca uno del otro, dos al mismo tiempo. Cuando se juntan los objetos A y B, se repelen. Cuando se
docker41 [41]

Answer:

Los objetos A y C tienen cargas del mismo signo (opcion a)

Explanation:

Hay dos tipos de cargas : cargas positivas y cargas negativas.

La Ley de Coulomb dice que la fuerza electrostática entre dos cargas puntuales es proporcional al producto de las cargas e inversamente proporcional al cuadrado de la distancia que las separa, y tiene la dirección de la línea que las une y se cumple que:

  • La fuerza ejercida sobre una carga apunta hacia la otra cuando las dos tienen distinto signo (fuerza atractiva).
  • El sentido de la fuerza se dirige hacia el lado opuesto de la carga cuando ambas tienen el mismo signo (fuerza repulsiva).

Es decir que las cargas de igual signo se repelen, mientras que las de diferente signo se atraen.

Entonces, si se juntan los objetos A y B y se repelen significa que la carga es del mismo signo.

Cuando se acercan los objetos B y C, se repelen. Entonces significa que posee carga de igual signo.

Por lo que podes concluir que <u><em>los objetos A y C tienen cargas del mismo signo (opcion a)</em></u>

8 0
3 years ago
What is the sequence of energy transformations that occur in a nuclear reactor?
svet-max [94.6K]
Nuclear reactions release energy used to heat steam which spins a turbine to generate electrical energy. Thus,
B. nuclear to thermal to mechanical to electrical
6 0
3 years ago
Read 2 more answers
The predictions of Rutherford's scattering formula failed to correspond with experimental data when the energy of the incoming a
Vera_Pavlovna [14]

Answer:

The radius of the gold nucleus is 7.1x10⁻¹⁵m

Explanation:

The nearest distance is:

r=\frac{kze^{2} }{mpV^{2} } (eq. 1)

Where

z = atomic number of gold = 79

e = electron charge = 1.6x10⁻¹⁹C

k = electrostatic constant = 9x10⁹Nm²C²

energy of the particle = 32 MeV = 5.12x10⁻¹²J

At the potential energy is zero, all the energy will be kinetic energy:

E_{k} =\frac{1}{2} m V^{2}

Where

m = 4 mp = mass of proton

5.12x10^{-12} =\frac{1}{2} *4*m_{p}* V^{2} \\m_{p}* V^{2} = 2.56x10^{-12}

Replacing in equation 1

r=\frac{9x10^{9}*79*(1.6x10^{-19})^{2}   }{2.56x10^{-12} } =7.1x10^{-15} m

8 0
3 years ago
A low C (f = 65Hz) is sounded on a piano. If the length of the piano wire is 2.0 m and its mass density is 5.0 g/m2, determine t
Pie

Answer:

338N

Explanation:

Use the formula f=\frac{\sqrt{\frac{T}{\frac{M}{L}} } }{2L}

f is the frequency, T the string tension, M the mass, and L the length

convert units to seconds, kilograms, meters

65Hz\ =\ \frac{\sqrt{\frac{T}{\frac{0.005kg}{m}}}}{2\cdot2m}

now solve for T

sqrt(T/.005) = 65*4 = 260

T = 338N

8 0
4 years ago
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