Ok so in this experiment what we want to find is the catalyst for the reaction. Our original reaction is the following. A + B --> C, therefore to find which of the unknown substances (X, Y, and Z) is the catalyst reaction we simply have to do the following:
A + B + X --> C
A + B + Y --> C
A + B + Z --> C
The reaction that produces C much faster than our original reaction A + B --> C will be our catalyst. The reason being that one of the substances will increase the rate of the chemical reaction.
I hope it helps, Regards.
Answer: C. Shadow length decreased from sunrise to noon.
Explanation: Think about how the sun is positioned in the sky. If it was noon, the sun is above the stick which means little to no shadow at all. If the sun was rising, its hitting one side of the stick, making the shadow longer.
Parallel circuits are circuits when placed in a parallel
position. Meaning that for each device, they have their own branch. The voltage
that is received in the circuit is equal to the individual devices. The total
current is equal to the current of each device. The resistance is the reciprocal
of the resistances of each device combined.
Given:
Device 1 = 12 ohms
Device 2 = 4 ohms
Voltage total = 40V
Required:
Current at 12 ohms
Solution:
40V = V1 =V2
Since V =IR
I1 = V1/R1
I1 = (40V)/(12 ohms)
<span><u>I1 = 3.334 A(Amperes)</u></span>
Answer:
Organism in a lichen that provides protection - algae
Organism in a lichen that provides nutrients through photosynthesis - algae
Branched growth form of lichen - fruticose
Leafy growth form of lichen - foliose
Small and flat growth form of lichen - crustose
Explanation:
<em>Lichens are composite organisms that are formed from symbiotic relationships between fungi and cyanobacteria/algae. The Green algae layer offers food to the fungi by photosynthesis while the latter supplies nutrients and offers protection to the algal component. </em>
There are different types of lichen based on the growth structure:
Fruticose lichens grow upright and shrubby and posses either round or flat branches.
Foliose lichen appears like a leaf with upper and lower layers. They are usually flat or convoluted in nature.
Crustose lichens are small in appearance with flat, crusty growth on surfaces on which they grow.
Usually, only mammals undergo Carnegie stages.
Therefore, 'B. Sheep' would be the correct answer.
