**Answer: **Coral reef structures also buffer shorelines against 97 percent of the energy from waves, storms, and floods, helping to prevent loss of life, property damage, and erosion. When reefs are damaged or destroyed, the absence of this natural barrier can increase the damage to coastal communities from normal wave action and violent storms.

Light shows duality i.e it shows properties of both particle as well as wave.

We know the equation

weight = mass × gravity

To work out the weight on the moon, we will need its mass, and the gravitational field strength of the moon.

Remember that your weight can change, but mass stays constant.

So using the information given about the earth weight, we can find the mass by substituting 100N for weight, and we know the gravity on earth is 10Nm*2 (Use the gravitational field strength provided by your school, I am assuming yours in 10Nm*2)

Therefore,

100N = mass × 10

mass= 100N/10

mass= 10 kg

Now, all we need are the moon's gravitational field strength and to apply this to the equation

weight = 10kg × (gravity on moon)

The answer to the first question is -1.5 m/s^2

The relationship between gravitational force and distance of separation is an **"inverse relationship"**.

<u>**Explanation:**</u>

Gravitational force has been explained by "Newton's Universal Law of Gravitation" which says "In this universe every single particle attract every other particle with a force which directly proportional to the product of their masses while **inversely proportional to the square of the distance in between them"**.

The gravitational force is inversely proportional to square of distance because as the distance between the objects with **masses increases the force decreases**. The gravitational force between any two objects with masses can be understood by given formula:

** **

Here the **F is gravitational force**,

G is the gravitational constant =

are the masses of the two objects

d is the distance between two objects.