Uma criança anda em uma pista circular de raio 100m, gastando 20 minutos para percorrer metade da pista. Indique o deslocamento da criança.

200m

Explanation:

This can be translated to:

A child walks on a circular track with a radius of 100m, spending 20 minutes to cover half the track. Indicate the child's displacement.

Ok, we want to know the displacement, which is equal to the difference between the initial position and the final position.

if the kid starts at any point of the circular track, we know that he covers half the track, so he actually covers a semicircle.

This means that we can connect the initial position and the final position with the diameter of the circle.

(The diameter is two times the radius).

Then the distance between the final position and the initial position (the total displacement) is equal to two times the radius:

Displacement = 2*100m = 200m

(75°f − 32) × 5/9 = 23.889°c

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​