There's three kind of variables which are Independent, dependent, and controlled.
How long should concrete be allowed to set before it is ready to be used? 7 days
In standard industrial cases, full strength concrete is recognized at 28 days. At seven days, you should have concrete that is cured to 70% full strength or greater. hope this helped!
All but one of the conditions will increase the reaction rate of an enzyme. The condition that will NOT increase the reaction rate is
decreasing the concentration of the enzyme.
How does Earth receive water?
The planet earth is a closed system where materials cycle between the lithosphere, atmosphere, hydrosphere and biosphere. It does not lose materials to the outside and neither does it receive any from outer space.
The water that has been there since the earth was created is still the same. It is used and recycled over and over again through the hydrologic (water) cycle. It is never lost. but changes its form from liquid to vapor to ice or snow then back to liquid in a continuous cycle.
Which of the following is most likely to be a limiting factor for growth on the floor of a tropical rainforest? a.
The tropical rainforest is the moist biome which is present near the equator of the Earth. These rainforests receive an average of 60-160 inches of rainfall per year with no dry season throughout the year. In these forests, the canopy of the trees prevent the sunlight from reaching the floor of the forest. This makes it difficult for the vegetation to survive on the floor as sunlight is essential for the growth of the vegetation on the floor.
Hence, the correct answer is 'option - C - sunlight'.