If the breakers at a beach are separated by 5 m and hit shore with a frequency of 0.3 Hz, at what speed are they traveling?

Answers

Answer 1

Answer:
Wave speed = (frequency) x (wavelength)

= (0.3 Hz) x (5 m)

= 1.5 m-Hz = 1.5 m/s .

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Three balls leave the edge of a table at the same time. Ball A rolls off the table with an initial horizontal velocity. Ball B is launched at an angle and has both an initial horizontal and vertical velocity. Ball C is dropped from rest, and has no initial velocity.a) Explain which one(s) hit the ground first.

b) Explain which one(s) hit the ground last

Answers

Explanation:

Balls A and C have the same initial vertical velocity of zero. Therefore, they land at the same time.

Ball B has a positive initial vertical velocity, so it hits the ground last.

When the sun warms the sidewalk on a hot sunny day, what type of energy conversion occurs?

Answers

The energy conversion would be radiant to thermal.

Radiation I believe.

Select the type of volcanoes that frequently erupt violently?A. Cinder cone

B. Stratovolcano

C. Shield volcano

* it’s not B

Answers

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The ratio of output power yo input power, in percent, is called

Answers

The ratio of output power to input power for a machine is called the machine's efficiency. It doesn't have to be expressed in percent.

a 42.3 kg girl and a 7.93 kg sled are on the surface of a frozen lake, 15.0m apart and linked by a rope, but not moving yet. then the girl pulls on the rope, exerting a 5.76 N force on the sled, pulling it toward her. how far from the girl's original position do they meet?

Answers

Answer:

they meet from the girl's original position at: 2.37 (meters)

Explanation:

We need to use the Newton's law, exactly the second law that relate force, mass and acceleration as: $F=m*a$ with this we can get both accelerations; solving for acceleration $a=(F)/(m)$ . Now $a_(girl)=(5.76)/(42.3)=0.14 (m/s^(2))$ and $a_(sled)=(5.76)/(7.93)=0.73(m/s^(2))$ . Then knowing that they both travel at the same time and assuming that the distance among the girl and the sled is: 15.0-x, so, $x=(1)/(2)*a_(girl)*t^(2)$ and $15.0-x=(1)/(2)*a_(sled)*t^(2)$ , solving for the time we get: $t=\sqrt{(2x)/(a_(girl) ) }$ and $t=\sqrt{(2*(15.0-x))/(a_(sled) ) }$ with this equations we solving for the x that is the distance between the girl and the sled after the apply the force and we get: $\sqrt{(2x)/(a_(girl))} = \sqrt{(2*(15.0-x))/(a_(sled) )$ . Finally we get: $(x)/(a_(girl) )=((15.0-x))/(a_(sled) )$ and replacing the values we have got: $(x)/(0.14) =((15.0-x))/(0.73)$ so $5.33*x=15-x$ so x=2.37 (meters).

What is the main difference between a longitudinal wave and a transverse wave? a longitudinal wave travels faster than a transverse wave. a transverse wave always has a larger amplitude than a longitudinal wave. the motion of the medium is parallel to a longitudinal wave and perpendicular to a transverse wave. the frequency is directly proportional to wavelength in a longitudinal wave but inversely proportional in a transverse wave.?

Answers

When waves propagate in a medium, then the motion of the medium is parallel to a longitudinal wave and perpendicular to a transverse wave.

What are sound waves?

A sound wave is caused by disturbances in the path of propagation of the particles. These disturbances can be caused in the medium like solid, liquid, and air.

There are two main types of waves namely - Transverse waves and longitudinal waves.

Transverse Waves - These waves are the waves where the particles in a medium travel perpendicular to the direction of the wave. These waves do not require a medium to travel and can travel in a vacuum also.

Longitudinal waves - These waves are the waves where the particles of the medium travel parallel to the direction of the wave and these waves require a medium to travel and hence, cannot travel in a vacuum.

Thus, we can conclude that the motion of the medium is parallel to a longitudinal wave and perpendicular to a transverse wave.

Learn more about the sound wave here:

brainly.com/question/3004869

Answer: The correct answer is the motion of the medium is parallel to a longitudinal wave and perpendicular to a transverse wave.

Explanation:

There are two main types of waves:

1. Transverse Waves: These waves are the waves where the particles in a medium travel perpendicular to the direction of the wave. These waves do not require a medium to travel and can travel in vacuum also. For Example: Light waves.

2. Longitudinal waves: These waves are the waves where the particles of the medium travel parallel to the direction of the wave and these waves require a medium to travel and hence, cannot travel in vacuum. For Example: Sound waves.

From the given options, the correct answer is the motion of the medium is parallel to a longitudinal wave and perpendicular to a transverse wave.

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