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Hallo Katja, wie geht's dir? Ich bin auf Urlaub in den Alpen in der Schweiz und habe an dich gedacht! Wie du wei...

Hjülstrom curve is a logarithmic graph which shows the relationship between sediment size and velocity. The two curves on the graph show what happens to sediment in transit for various velocities. The fir...

1. Label first equation as equation 1 and the second as equation 22) Make y the subject of the equation from equation (1); hence: eq 1 : y = -4 -3x3) Substitute the new equation into equation (2) : 3x-...

Freeze-thaw weather occurs when water enters a small crack in a rock, which often happens during rainfall, then when temperatures fall to below 0 degrees celsius this water freezes and expands. This widen...

y = x + 3x² + 2y = 9We want to make the squared equation have either only x's or only y's, so we substitute y = x + 3 into the equation:x² + 2(x + 3) = 9We need to take out the brack...