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# Tutor profile: Drmohamed M.

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Drmohamed M.
tutor for 10 years
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## Questions

### Subject:Applied Mathematics

TutorMe
Question:

how can you solve the kinematic in one dimension problems?

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Drmohamed M.

Problem Solving Strategy 1. Draw a picture (Mental or on Paper) 2. List known and unknown variables. a) Caution; some may be extraneous, and are not necessary to solve the problem. b) Often either the starting or ending point is at rest, meaning a value of zero. 3. Do necessary conversions. 4. Choose an equation that can be solved with the known variables. a) This equation may or may not be the answer you are looking for. b) It may provide a new variable for use in another equation. c) This may lead to a succession of equations. + or – ????: “ + ” & “– ” can be used to indicate direction, and/or acceleration (+) or deceleration (–). –9.8 m/s2 Be careful here. Does this mean the object is decelerating (slowing) or does it mean that the object is moving along a negative (perhaps the y) axis? It would depend on the problem. For an object moving on the x axis it would mean decelerating. For an object falling along the y axis, due to gravity, it means the object is accelerating, but in the downward direction (-+9.8). In forces it is easier to use 9.8 m/s2 as a positive number.

### Subject:Biology

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Question:

What is the artificial kidney?

Inactive
Drmohamed M.

The artificial kidney: Kidney failure takes place due to some diseases. The kidney stops functioning and this leads to the accumulation of harmful wastes in the blood. In treating cases of kidney failure, a tube is inserted into an artery in the patient’s arm and the blood is channeled through semi-permeable tube immersed in a bath containing all the normal blood chemicals except urea and other metabolic wastes. Since the concentration of harmful metabolic wastes is higher in the blood than in the bath, they pass through the wall of the tubes into the bath and purified blood is returned to the body. A patient receives artificial kidney treatment for several hours each day, 2 – 3 times a week.

### Subject:Physics

TutorMe
Question:

what is meant B decay?

Inactive
Drmohamed M.

Atoms emit beta particles (β) through a process known as beta decay. Beta decay occurs when an atom has either too many protons or too many neutrons in its nucleus. Two types of beta decay can occur: a) One type (positive beta decay) releases a positively charged beta particle called a positron, and a neutrino; b) The other type (negative beta decay) releases a negatively charged beta particle (an electron), and an antineutrino. The neutrino and the antineutrino are high energy elementary particles with little or no mass and are released in order to conserve energy during the decay process. Negative beta decay is far more common than positive beta decay and therefore, we often think of beta particles as electrons.  The result is that the atomic number goes up by one and the mass number remains unchanged in beta decay.

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