Which of the following describes what causes the sailboat's velocity?O A. The water is pushing the boat 8 m/s downstream.
OB. The water is pushing the boat 20 m/s upstream.
C. The water is pushing the boat 6 m/s against the wind.
OD. The water is pushing the boat 10 m/s downstream

Answer;

D. A long ridge of sediment deposited by the longshore current and separated from the mainland

A barrier island is a long ridge of sediment deposited by the longshore current and separated from the mainland.

Explanation;

• A barrier island is a long, thin, sandy stretch of land that is oriented parallel to the mainland coast. The barrier island protects the coast from the full force of powerful storm waves.
• The barrier islands are very important as they protect the mainland from storms and waves. Additionally, they protect tidal lagoons that serve as nurseries for a variety of fish and shellfish.

Answer:

0.20kg-m^2

Explanation:

Let the linear velocity of the rope(=of pulley) is v m/s

Using kinematic equation

=> v = u + at

=>v = 0 + 4.9a

=>v = 4.9a ------------ eq1

By v^2 = u^2 + 2as

=>v^2 = 0 + 2 x v/4.9 x 1.2

=>4.9v^2 - 2.4v = 0

=>v(4.9v - 2.4) = 0

=>v = 2.4/4.9 = 0.49 m/s

Thus by v = r x omega

=>omega = v/r = 0.49/0.02 = 24.49 rad/sec

BY W = F x s = 50 x 1.2 = 60 J

=>KE(rotational) = W = 1/2 x I x omega^2

=>60 = 1/2 x I x (24.49)^2

=>I = 0.20 kg-m^2

The wavelength of the wave will be 4 meters. when 5 complete waves occupy a length of 20m.

What is wavelength?

Wavelength is defined as the space between waves' crests, particularly between electromagnetic or sound wave points. A recurring event's frequency is measured by how many times it occurs in a unit of time. To underline the difference from spatial frequency, it is also occasionally referred to as temporal frequency.

There is an inverse relationship between the frequency and the wavelength of the waves as the wavelength increases the frequency decreases and if the wavelength decreases the frequency increases.

Given that a wave has 5 complete waves occupying a length of 20m. The wavelength of the wave will be calculated as below:-

λ = Distance / frequency

λ = 20 / 5

λ = 4 meters

Therefore, the wavelength of the wave will be 4 meters. when 5 complete waves occupy a length of 20m.

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Answer:

d all of the above are correct

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.

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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.