Ekaant

University M

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wrote the 15/07/2012 10:39

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Ekaant hasn't written any article yet## Questions

## 4

Answers#### Scientists use emission spectra to confirm the presence of an element in materials of unknown composition. Why is this possible?

How it is used?

30/06/2014
## 1

Answers#### "A single force acts on a particle situated on the positive x axis. The torque about the origin is in the negative zdirection. The force might be: "

"A. in the positiveydirection
B. in the negativeydirection
C. in the positivexdirection
D. in the negativexdirection
E. in the positivezdirection"

26/02/2013
## 1

Answers#### "As a 2.0-kg block travels around a 0.50-m radius circle it has an angular speed of 12rad/s. The circle is parallel to thexyplane and is centered on thezaxis, 0.75m from the origin. The component in thexyplane of the angular momentum around the origin has a magnitude of: "

"A. 6.0kg·m
B. 9.0kg·m
C. 9m2/s
D. 14kg·m
E. 20kg·m"

26/02/2013
## 1

Answers#### "As a 2.0-kg block travels around a 0.50-m radius circle it has an angular speed of 12rad/s. The circle is parallel to thexyplane and is centered on thezaxis, a distance of 0.75m from the origin. Thezcomponent of the angular momentum around the origin is: "

"A. 6.0kg·m2/s
B. 9.0kg·m2/s
C. 11kg·m2/s
D. 14kg·m2/s
E. 20kg·m2/s"

26/02/2013
## 1

Answers#### "As a 2.0-kg block travels around a 0.50-m radius circle it has an angular speed of 12rad/s. The circle is parallel to thexyplane and is centered on thezaxis, 0.75m from the origin. The magnitude of its angular momentum around the origin is:"

"
A. 6.0kg·m2/s
B. 9.0kg·m2/s
C. 11kg·m2/s
D. 14kg·m2/s
E. 20kg·m2/s"

26/02/2013
## 1

Answers#### "The angular momentum vector of Earth about its rotation axis, due to its daily rotation, is directed: "

"A. tangent to the equator toward the east
B. tangent to the equator toward the west
C. north
D. south
E. toward the Sun"

26/02/2013
## 1

Answers#### "The newton·second is a unit of: "

"A. work
B. angular momentum
C. power
D. linear momentum
E. none of these"

26/02/2013
## 1

Answers#### "The unit kg·m2/s can be used for: "

"A. angular momentum
B. rotational kinetic energy
C. rotational inertia
D. torque
E. power"

26/02/2013
## 1

Answers#### "Possible units of angular momentum are: "

"A. kg·m/s
B. kg·m2/s2
C. kg·m/s2
D. kg·m2/s
E. none of these"

26/02/2013
## 1

Answers#### "The fundamental dimensions of angular momentum are: "

"A. mass·length·time−1
B. mass·length−2·time−2
C. mass2·time−1
D. mass·length2·time−2
E. none of these"

26/02/2013
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