Ehaab

University M

## Wall

wrote the 15/07/2012 10:33

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Ehaab hasn't uploaded any document yet## Videos

Ehaab hasn't uploaded any video yet## Blog posts

Ehaab hasn't written any article yet## Questions

## 1

Answers#### "The contributions of J. J. Thomson and Ernest Rutherford led the way to today’s understanding of the structure of the atom. What were their contributions?"

How it leads to other inventions.

23/05/2014
## 0

Answers#### "Two wheels are identical but wheel B is spinning with twice the angular speed of wheel A. The ratio of the magnitude of the radial acceleration of a point on the rim of B to the magnitude of the radial acceleration of a point on the rim of A is: "

"A. 1
B. 2
C. 1/2
D. 4
E. 1/4"

26/02/2013
## 0

Answers#### "For a wheel spinning on an axis through its center, the ratio of the radial acceleration of a point on the rim to the radial acceleration of a point halfway between the center and the rim is: "

"A. 1
B. 2
C. 1/2
D. 4
E. 1/4"

26/02/2013
## 0

Answers#### "For a wheel spinning on an axis through its center, the ratio of the tangential acceleration of a point on the rim to the tangential acceleration of a point halfway between the center and the rim is: "

"A. 1
B. 2
C. 1/2
D. 4
E. 1/4"

26/02/2013
## 0

Answers#### "For a wheel spinning with constant angular acceleration on an axis through its center, the ratio of the speed of a point on the rim to the speed of a point halfway between the center and the rim is: "

"A. 1
B. 2
C. 1/2
D. 4
E. 1/4"

26/02/2013
## 0

Answers#### " Wrapping paper is being from a 5.0-cm radius tube, free to rotate on its axis. If it is pulled at the constant rate of 10cm/s and does not slip on the tube, the angular velocity of the tube is:"

"A. 2.0rad/s
B. 5.0rad/s
C. 10rad/s
D. 25rad/s
E. 50rad/s"

26/02/2013
## 0

Answers#### "A car travels north at constant velocity. It goes over a piece of mud, which sticks to the tire. The initial acceleration of the mud, as it leaves the ground, is:"

"
A. vertically upward
B. horizontally to the north
C. horizontally to the south
D. zero
E. upward and forward at 45
to the horizontal"

26/02/2013
## 0

Answers#### "A wheel of diameter 3.0cm has a 4.0-m cord wrapped around its periphery. Starting from rest, the wheel is given a constant angular acceleration of 2.0rad/s2. The cord will unwind in:"

"
A. 0.82s
B. 2.0s
C. 8.0s
D. 16s
E. 130s"

26/02/2013
## 0

Answers#### "A cylinder of radius 0.7m rotating about its axis at 10rad/s. The speed of the point P is"

"A. 7.0m/s
B. 14πrad/s
C. 7.0πrad/s
D. 0.70m/s
E. none of these"

26/02/2013
## 0

Answers#### "A child, riding on a large merry-go-round, travels a distance of 3000m in a circle of diameter 40m. The total angle through which she revolves is: "

"A. 50rad
B. 75rad
C. 150rad
D. 314rad
E. none of these"

26/02/2013
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