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Explain a reflex arc

A reflex arc is the nerve pathway which follows a reflex action. First a stimulus, like a pin prick, is detected by receptors in the skin. A sensory neurone then sends electrical impulses to a relay neurone,...
CS
Answered by Clara S. • Biology tutor
12798 Views

Du bist mit deiner Familie auf Urlaub. Schreib eine E-Mail an deinen Freund in der Schweiz, in der du ihm beschreibst, wie der Urlaub läuft.

Hallo Katja, w ie geht 's dir? Ich bin auf Urlaub in den Alpen in der Schweiz und habe an dich gedacht ! Wie du weißt, habe ich immer Angst vor einem Flug, aber diesmal war es ok. Ich bin zwar gerade nach de...
CM
Answered by Connor M. • German tutor
4033 Views

What does Hjülstrom curve show?

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 first ...
RH
Answered by Rowan H. • Geography tutor
5889 Views

Solve the simultaneous equations 3x + y = –4 and 3x – 4y = 6

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- 4(-4-3x)...
MI
Answered by Munachi I. • Maths tutor
3640 Views

How does freeze-thaw weathering occur?

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 widens t...
EG
Answered by Emily G. • Geography tutor
5501 Views