As you didn't state the possible answers I am acting on previous knowlage so don't hate me if its wrong. I would have to say acetlyne.
Answer:
Water erosion refers to the removal of the top most or surface layer of soil by the flow of water. The long term effect of water erosion can be because of drastic rain fall and may be because of flood. These two reasons can adversely effect the human life. The water erosion is responsible for the removal of fertile layer of soil, therefore, the region will not be appropriate to grow vegetation. The long term effect may result in stagnation of water, therefore, long time is required so that the region gets dried. The long term accumulation of water over an agricultural field can spoil the crop production.
Prevention that can be taken to reduce long term effect of water erosion:
1. Plantation of long root bearing trees over flood prone regions and around the agricultural field: This will allow the trees to tightly hold up soil and prevent it's erosion.
2. Add rocks over the soil: In an agricultural field or flood prone area, the rocks will act as barrier for the movement of run off water, hence, will prevent water erosion. It will increase the absorption of water by soil.
3. Building of walls: This will also act as a barrier in a flood prone region and will prevent the water being added up to the agricultural land.
4.Remove soil compaction: If the soil compaction of the effected region is removed, the water retention property of the soil can be improved. Machines, animals and humans can be used for this purpose to remove the compaction of upper layer of soil.
Answer:
b. Mutations are random so it would be impsosbile to predict a specific mutation
Explanation:
Answer:
Saprotrophic nutrition: Saprotrophic nutrition is a type of nutrition in which the organisms take nutrients from dead bodies of plants and animals.
Explanation: This type of nutrition is present in microorganisms such as fungi and bacteria etc. These Saprophytic organism such as bacteria and fungi help in decomposition of dead organisms and helps in cleaning the environment. It also provides nutrients to the soil which uses by the plants and make their food from it.
The answer would be:
6,250 joules
Here's how to do it:
KE = kinetic energy (joules)
m = mass (kg)
v = velocity (m/s)
So with that formula let's figure out what was given to you.
500 kg and 5m/s
You know which is which based on the unit.
m = 500kg
v = 5m/s
Now all you need to do is plug it into your formula and solve.
The unit also means joules
So the final answer is 6,250 joules.