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swat32
3 years ago
9

1. Do the particles in the medium material move in the same direction of the wave or at opposite direction to the wave? Explain

your answer.
2. By inputting more energy into the wave, i.e a large shake of the spring, which wave property also increases?

3. Are there forces of friction acting while a wave is passing through a medium?
Physics
1 answer:
juin [17]3 years ago
7 0

1. Both

Assuming we are talking about a longitudinal wave (where particles oscillate in a direction parallel to the direction of motion of the wave), the answer is 'both'. In fact, waves consist of oscillations of the particles of a medium: in the case of the longitudinal waves, the particles oscillate back and forth, back and forth, continuosuly. This means that at some time they are moving forward, while at some time they are moving backward, with respect to the direction of the wave.


2. The amplitude

The energy of a wave is related to its amplitude. More specifically, the energy of a wave is proportional to the square of its amplitude:

E\propto A^2

therefore, if the spring has a larger amplitude of oscillation, it also has more energy.


3. Yes

Forces of friction act while a mechanical wave passes through a medium. As a result, particles during the oscillations lose part of their energy: this means that the amplitude of the oscillations of the wave decrease over time, because the wave loses some energy. Eventually, if the friction lasts enough, the wave can lose all its energy.

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What is the current in a 160V circuit if the resistance is 2Ω? V= I= R =
sveta [45]

Answer:

80 amperes

Explanation:

Current in the circuit = ?

Voltage in the circuit = 160 Volts

Resistance = 2 Ω

Voltage = Current x Resistance

V = IR

160V = I x 2 Ω

I = 160V / 2 Ω

I = 80 Amperes

Therefore the current in the circuit is 80 amperes :)

8 0
3 years ago
What is the pendulum length whose period is 2.0s ?
Mashutka [201]
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 \frac{T}{2 \pi } = \sqrt{ \frac{L}{g} }|square\\
 \frac{T^2}{2 \pi }  = \frac{L}{g} \\
 \frac{T^2}{2 \pi }*g=L\\
L= \frac{2^2}{2*3,14 }*9,8= \frac{39,2}{6,28} =6,24m

7 0
3 years ago
Help please:Calculate the mechanical energy of a bird flying at a speed of 10 m / s at an altitude of 15 m. If its mass is 150 g
Sonja [21]

Mass of the bird(m) = 150 g = 0.15 kg

Speed (v) = 10 m/s

Kinetic Energy = \frac{1}{2}m v^{2} = \frac{1}{2} 0.15 (10)^{2} = 7.5 J

Altitude (h) = 15 m

Gravitational Potential Energy = (0.15)(9.81)(15) = 22.0725 J

Mechanical Energy = Kinetic Energy + Potential Energy = 7.5 + 22.0725

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The surrounding natural environment is an environment that is mostly social. Therefore, using, using the mentioned definition, we need to consulate a social scientist.

This person can give information about the behavior of humans in social areas.

Then, Janet can get help from a social scientist.

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Option A

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