The amplitude of a wave is a measure of the energy it carries. The amplitude of a wave is the distance between the midline of a wave and its crest or trough.

Amplitude measures the amount of energy being transported by a wave. The larger the amplitude, the more the energy that a wave has.

Wave such as water waves have energy. Smaller waves have less energy because they have a smaller amplitude. Tsunamis have very high amplitudes and thus have a huge amount of energy

**Given parameters: **

Displacement = 8km

Velocity = 3.8km/h

Unknown:

time = ?

**Solution: **

Velocity is displacement divided by time.

Velocity =

Displacement = velocity x time

Input the parameters:

8 = 3.8 x time

Time = = **2.1s**

**The time taken is 2.1s**

Huh? Wheres the question at?

See the attached figure.

The black arrows represent the two given vectors. The dashed black arrows are these same vectors, but translated so that the end of one vector is aligned with the start of another.

The red vector is their sum.

In case you also need to find the magnitude and direction of the sum, we have

A = (120 N) (cos(30°) i + sin(30°) j) = (60√3 i + 60 j) N

B = (-100 N) (cos(90°) i + sin(90°) j) = (-100 j) N

⇒ A + B = (60√3 i - 40 j) N

⇒ ||A + B|| = √((60√3)² + (-40)²) N = 20√31 N

and its direction relative to the positive horizontal axis (rightward) is θ such that

tan(θ) = (-40) / (60√3) = -2/(3√3)

⇒ θ = arctan(-2/(3√3)) ≈ -21.05°

**Answer:**

umm this is not a question

**Explanation:**