What is the time tb it will take for point b of the wavefront to encounter the vacuum/material interface? note that you will express your answer in a slightly unusual way?

Surface/interface waves are waves that have maximum intensity at the interface and decrease exponentially from the interface to liquid and solid media. The name of this wave is the Scholte Wave.

To find the distance from one point to another point through the map, we must know the scale of the map. For example, a map has a scale of 1: 300,000, this means that the distance of 1 cm on the map represents a distance of 300,000 cm (3 km).

Scale Formulas

Scale is a comparison between the distance on the map and the actual distance, so it can be formulated as follows.

Scale = distance on the map: the actual distance

Then how do you find the real distance on the map?

First, find out first the map scale.

Determine the starting point that you want to measure, then measure to another point. For example, you want to measure the distance of America to Canada, measure the distance of these two countries on the map, count how many centimeters.

After that, just calculate the distance on the map divided by scale.

Example:

The distance between city Y and city Z is 250 km. What is the distance between the two cities on a map with a scale of 1: 10,000,000?

Information:

S = scale

DP = distance on the map

TD = actual distance

TD = 250 km = 25,000,000 cm

S = 1: 10,000,000

TD = ...?

S = DP: TD

DP = S x TD

DP = 1 / 10,000,000 x 25,000,000

DP = 2.5 cm

So, the distance between the two cities on the map is 2.5 cm.

Learn More

Scholte Waves

how to calculate the map scale

Details

Class: high school

Subject: geography

Keywords: waves, interface, scale

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