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nirvana33 [79]
3 years ago
7

Would the energy of the wave increase or decrease if the speed of the wave increases? Why?

Physics
1 answer:
choli [55]3 years ago
4 0

Answer:

i hope this helps some

Explanation:

The time-averaged power of a sinusoidal wave is proportional to the square of the amplitude of the wave and the square of the angular frequency of the wave. This is true for most mechanical waves. If either the angular frequency or the amplitude of the wave were doubled, the power would increase by a factor of four.

The speed of a wave is dependant on four factors: wavelength, frequency, medium, and temperature. Wave speed is calculated by multiplying the wavelength times the frequency (speed = l * f).

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the guage pressure in a car tire is 30.0 psi when the air temperature is 0 C as the day warms up and brighten sun shines What is
Viktor [21]

Answer:

P_2 = 33.297\ psi

Explanation:

give,

Gauge pressure of car, P₁ = 30 psi

temperature,T₁ = 0° C = 0 + 273 = 273 K

Assuming temperature at the noon = 30° C

       T₂ = 30 + 273 = 303 K

 Pressure at this temperature, P₂ = ?

Using ideal gas equation

\dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}

taking volume as in compressible  V₁ = V₂

\dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}

\dfrac{30}{273}=\dfrac{P_2}{303}

P_2 = 303\times \dfrac{30}{273}

P_2 = 33.297\ psi

Hence, Pressure of the at 30°C is equal to 33.297 psi.

3 0
3 years ago
Which is the last stage in the life cycle of an average star? (1 point)
Shkiper50 [21]

Answer:

The answer is A. White Dwarf

Explanation:

  • <u>average stars like sun end their life as white dwarf surrounded by disappearing planetary nebula. </u>
4 0
2 years ago
Por que no céu sem nuvens a lua nova não é visivel e a lua cheia aparece em grande destaque?
weeeeeb [17]
Porque la matematica es imposible

4 0
3 years ago
A system of releases 125kJ of heat while 104kJ of work is done in the system. Calcilate the change om imternal energy (in kJ)
artcher [175]

Answer:

DU = 21 KJ

Explanation:

Given the following data;

Quantity of heat = 125 KJ

Work = 104 KJ

To find the change in internal energy;

Mathematically, the change in internal energy of a system is given by the formula;

DU = Q - W

Where;

DU is the change in internal energy.

Q is the quantity of energy.

W is the work done.

Substituting into the formula, we have;

DU = 125 - 104

DU = 21 KJ

4 0
2 years ago
A 2.0 kg wood block is launched up a wooden ramp that is inclined at a 30° angle. The block’s initial speed is 10 m/s. What vert
Romashka [77]

Answer:

Vertical Height = 0.784 meter, Speed back at starting point = 10 m/s

Explanation:

Given Data:

V is the overall velocity vector, Vi and Ui are its initial vertical and horizontal components

R = 10 m/s\\ Projection Angle (theta) = 30 degrees\\Vi   = 10*sin(30) = 5 m/s\\Ui  = 10*cos(30) = 8.66 m/s

To find:

Max Height h achieved

Calculation:

1) Using the 3^{rd} equation of motion, we know

2*a*s = Vf^{2}  - Vi^{2}

2) In terms of gravity g height h and  the vertical component of Velocity Vf , Vi.

3) As Vf = 0 as at maximum height the vertical component of velocity is zero maximum height achieved

2*g*h = Vf^{2}  -Vi^{2}

putting values

4) h = 0.784 m/s

5) As for the speed when it reaches back its starting point, it will have a speed similar to its launching speed, the reason being the absence of air friction (Air drag)

3 0
3 years ago
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