Activation energy is the minimum quantity of energy that the reacting species must possess in order to undergo a specified reaction.
for example , striking a match on the side of a matchbox provides the activation energy, in the form of heat produced by friction.
Answer:
Pallor is caused by vasoconstriction of the dermal blood vessels
Explanation:
Pallor is paleness or wanness usually caused by vasoconstriction of the dermal blood vessels.
In other words. A deficiency in the color of the face.
A hypothesis is classified as an ¨If, Then¨ statement. Example: If I punch a brick, then it will hurt.
True I’m pretty sure! Hope I helped
It is made of two Hydrogen atoms and one Oxygen atom. That is why it is called H2O
