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2 years ago

What is the relationship between amplitude and frequency of a wave?.

Physics

1 answer:

kondaur [170]2 years ago

5 0

Answer:

The relationship between the wave's amplitude and frequency is such that it is inversely proportional to the frequency. The amplitude decreases as the frequency increases. The amplitude increases as the frequency decreases. The higher the energy of a wave, the higher the amplitude. The lower the energy, the lower the amplitude. Energy has no effect on wavelength, speed, or frequency, only the amplitude.

Explanation:

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What is the efficiency of an engine that exhausts 440 J of heat to a cold reservoir and receives 570 J of heat from a hot reserv

katrin2010 [14]

Answer:

Efficiency = 77%

Explanation:

Input energy = 570 J

Output energy = 440 J

To find the efficiency;

$Efficiency = \frac {Out-put \; energy}{In-put \; energy} * 100$

Substituting into the equation, we have;

$Efficiency = \frac {440}{570} * 100$

$Efficiency = 0.7719 * 100$

Efficiency = 77.19 ≈ 77%

Therefore, the efficiency of the engine is 77 percent.

7 0

3 years ago

The deepest point known in any of the earth's oceans is in the marianas trench, 10.92 km deep. assuming water to be incompressib

Jlenok [28]

The solution for the problem is:

The pressure of a column of fluid = rho g h

Where: rho = density,

g = 9.81m/s/s, and

h = depth

at 10.92km:

P = 1027kg * 9.81m/s/s * 10920 m

= 1027 kg x 107125.2

= 1.10 x 10^8 Pa (the MKS unit of pressure)

5 0

4 years ago

Read 2 more answers

Using local acceleration of gravity data from the Internet, de- termine the weight, in N, of a person whose mass is 80 kg living

Anna007 [38]

Answer

mass of a person is 80 kg

a) Mexico City, Mexico

acceleration due to gravity in mexico = 9.776 m/s²

weight = 80 × 9.776 = 782.08 N

b) Cape Town, South Africa

acceleration due to gravity in cape town = 9.796 m/s²

weight = 80 × 9.796 = 783.68 N

c) Tokyo, Japan

acceleration due to gravity in cape town = 9.798 m/s²

weight = 80 × 9.798 = 783.84 N

d) Chicago, IL

acceleration due to gravity in cape town = 9.803 m/s²

weight = 80 × 9.803 = 784.24 N

e) Copenhagen, Denmark

acceleration due to gravity in cape town = 9.815 m/s²

weight = 80 × 9.815 = 785.2 N

5 0

4 years ago

A 133 kg horizontal platform is a uniform disk of radius 1.95 m and can rotate about the vertical axis through its center. A 62.

cupoosta [38]

Answer:

The moment of inertia of the system is $I = 400.5 \ kg \cdot m^2$

Explanation:

From the question we are told that

The mass of the platform is $m = 133\ kg$

The radius of the platform is r = 1.95 m

The mass of the person is $m_p = 62.7 \ kg$

The position of the person from the center is $d = 1.19 \ m$

The mass of the dog is $m_D = 28.5 \ kg$

The position of the dog from the center is $D = 1.45 \ m$

Generally the moment of inertia of the platform with respect to its axis is mathematically represented as

$I_p = \frac{m r^2}{2}$

The moment of inertia of the person with respect to the axis is mathematically represented as

$I_z = m_p* d^2$

The moment of inertia of the dog with respect to the axis is mathematically represented as

$I_D = m_d * D^2$

So the moment of inertia of the system about the axis is mathematically evaluated as

$I = I_p + I_z + I_D$

=> $I = \frac{mr^2}{2} + m_p * d^2 + m_d * D^2$

substituting values

$I = \frac{(133) * (1.95)^2}{2} + (62.7) * (1.19)^2 + (28.5) * (1.45)^2$

$I = 400.5 \ kg \cdot m^2$

8 0

3 years ago

What defensive strategies are recommended to survive a nuclear blast?

almond37 [142]

Answer:

D. All of the above.

5 0

4 years ago