Answer:
vₓ = 5.5 mile / h and 
= 2.5 mile/h
Explanation:
This is a problem of adding vectors, but since the canoe and the river are in the same direction, we can make an ordinary sum, write the equations for each situation
I rowed down the river. In this case the speed of the canoe and the river are in the same direction, consequently, they add up
(vₓ + ) = d / 1.5
I rowed up. In this case the canoe and the river have reversed directions
(vₓ- ) = d / 4
Feel us two equations with two unknowns,
Let's start by adding the equations
2vₓ = d / 1.5 + d / 4
2vₓ = 12 (4 + 1.5) / 4 1.5
vₓ = 11/2
vₓ = 5.5 mile / h
Let's substitute in the first of the two equations to find the speed of the river
(vₓ +) = d / 1.5
= d / 1.5 - vr
= 12 / 1.5 -5.5
= 8-5.5
= 2.5 mile / h
Ammonia=a colorless gas with a characteristic pungent smell. It dissolves in water to give a strongly alkaline solution.
Inert=lacking the ability or strength to move.
Nitrates=a salt or ester of nitric acid, containing the anion NO3− or the group —NO3.
Limiting nutrient S=Nitrogen and phosphorus are frequently called “limiting nutrients.” This means that at any given time, one or the other of these nutrients may be the hardest nutrient for a plant to acquire and therefore be the only nutrient that is limiting the plant's growth.
saturation=the state or process that occurs when no more of something can be absorbed, combined with, or added. The degree or extent to which something is dissolved or absorbed compared with the maximum possible, usually expressed as a percentage.
Eutrophication=excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen.
Nitrification=Nitrification is the biological oxidation of ammonia or ammonium to nitrite followed by the oxidation of the nitrite to nitrate. The transformation of ammonia to nitrite is usually the rate limiting step of nitrification. Nitrification is an important step in the nitrogen cycle in soil.
Denitrification=Medical Definition of denitrification. : the loss or removal of nitrogen or nitrogen compounds; specifically : reduction of nitrates or nitrites commonly by bacteria (as in soil) that usually results in the escape of nitrogen into the air.
Answer:
Option c and d
Explanation:
The two mechanical devices which are used in laboratories for accurate measurement of small distances or small objects are calipers and micrometer.
Micrometer is a mechanical device used in laboratories like that of a screw gauge. It is used for the measurement of thickness of objects, length and the depth of the small objects which can be measured by holding the object in between the spindle and anvil of the micrometer.
Calipers is another mechanical device like that of vernier calipers used in laboratories for measurement of small distances, usually the distance between the opposing faces of the object. The measurement is usually taken on a digital display, a dial or a scale that is ruled.
The distance is measured by adjusting the tips of the caliper holding the object on a ruler.
Answer:
because of the weight is the canoe boat and can be dip off when you put to much pressure on to it.
Explanation:
Energy absorbed by the radiologist is 1.775*10^-6J.
To find the answer, we have to know about the radiation.
<h3>How much energy has she absorbed?</h3>
- We have the expression for dose of absorption as,
where; E is the energy absorbed and m is the mass of the body.
- From the above expression, substituting appropriate values given in the question, we get,
Thus, we can conclude that, the Energy absorbed by the radiologist is 1.775*10^-6J.
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