Question

Question )

a)

15 mm 115 mm 7.5 mm 115 mm 15 mm 50 mm 50 mm

Determine the I-beam's cross-sectional moment of inertia Ix about the horizontal x axis passing through the centroid.

options:

a

1.42 x 106 mm4

b

5.3 x 107 mm4

c

2.5 x 106 mm4

d

1.25 x 106 mm4

e

4700 mm4

b)

15 mm 115 mm 7.5 mm 115 mm 15 mm 50 mm 50 mm

Determine the I-beam's cross-sectional moment of inertia Iy about the vertical y axis passing through the centroid.

options:

a

5.3 x 107 mm4

b

2.5 x 106 mm4

c

4.10 x 106 mm4

d

1.29 x 107 mm4

e

1.25 x 106  mm4

c)

What is the atomic number of an atom?

options:

a

It is the total number of electrons, protons, and neutrons in the atom.

b

It is the total charge of the atom.

c

It is the total number of protons and neutrons in the atom.

d

It is the number of protons in the atom.

e

It is the total charge of the nucleus.

d)

A positively charged insulated rod is brought close to an object that is suspended by a string. If the object is shifted towards the rod we can conclude:

options:

a

The object is positively charge.

b

The object is an insulator.

c

The object is a conductor.

d

None of these answers are correct.

e

The object is negatively charged.

e)

A small glass bead has been charged to +20 nC. An electron is placed 1.0 cm from the bead. What is the acceleration of the electron?

Question 25 options:

a

1.7 x 1014 m/s2, directly toward the bead.

b

2.9 x 10-13 m/s2, directly toward the bead.

c

3.2 x 1017 m/s2, directly away from the bead.

d

3.2 x 1017 m/s2, directly toward the bead.

e

zero

0 0
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Answer #1

Provifing the solution of c and d ...Atomic no. of an atom is the total number of protono present in an atom option-dio Corred e bois 21=+2010. f. -1.6x10-190 x=l

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