# Ian

Member Since February 8, 2009

Retired chap. Enjoys helping others with maths and physics.

## Recent Activity by Ian

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### Answered:What is the fraction for 4 2/3?

You multiply the 4 by 3 and add 2 to get the numerator. The result is 14/3 Could you do another one of these now ? Regards - Ian

### Answered:How do binary numbers make sense?

There is a friendly, easy to follow introduction here. http://www.helpwithpcs.com/courses/binary-numbers.htm BINARY TO DECIMAL Example: to convert the 8 bit value 10011101 into a decimal value ...

### Answered:What is the "God particle" as it relates to ...

If you can listen to and understand this 6 minute video you will have some sort of answer. http://www.youtube.com/watch?v=1_HrQVhgbeo This is no threat to religious beliefs. It is nothing to do ...

### Answered:How much is too much studying?

The following is obvious advice, but is often ignored. It may sound strict, but it just amounts to taking a mature approach to studies and making a serious effort. Half-hearted efforts often lead to ...

### Answered:How would you solve the system of equations using ...

Example of matrix solution of 3 simultaneous equations (Arrange your own equations to this form) 3x + 4y - 2z = 4 2x -y + 5z = 18 -3x + 4y + z = 1 The matrix expression of these is | 3 4 -2| ...

The idea is that if you replace the inequality sign with an equals sign you find the edge of the region. First example: You should now get 2 lines. y = -x +3 This is a line with slope -1 that ...

Horizontal velocity component constant, (as it is perpendicular to the earth's gravitational field). Time t = distance/speed = 6.4/1.8 = 32/9 = 3 and 5/9 secs Without air resistance distance S of ...

Exactly the same idea as that aeroplane and bomb question, so see method given in that answer. Probe starts with zero vertical component of speed, so answer does not depend on the original speed of ...

a) Let the equal horizontal and vertical components of required speed be u Required speed will then be u*sqrt(2) Zero velocity at top of parabola after time t = u/g Total flight takes twice this ...

a) Air resistance not given so, for this school level example, assume this is meant to be ignored. S = (1/2) gt^2 with S = 1000 g = 9.8 (approx) t = sqrt(2S/g) ~ sqrt(2000/9.8) = 10sqrt(200/98) t ...

## Contacts

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## Compliments

OronD says:
"Ian You are doing a great job in Yedda. I see many of your math answers and you are always clear and accurate. Best personal regards, OronD. "
MackTheKnife says:
"I really like your answers. They are very clear and well thought out. "