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arlik [135]
3 years ago
5

Is it permissible to install recessed fixture directly against wood ceiling joists? Explain why or why not.

Engineering
1 answer:
masha68 [24]3 years ago
6 0

Answer:

No

Explanation:

It is not permissible to install recessed fixture directly against wood ceiling joists when the label on the fixture does not indicate that it can be used for Insulation in contact with the recessed fixture .

Because The trim finishing and points of support of openings in finished surfaces are not allowed to be in contact with the combustible materials

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Please help me bro come on
melomori [17]
Answer:

12

Explanation:

5 • 3 = 15
3 • 3 = 9
4 • 3 = 12
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3 years ago
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The 15-Mg tank car A and 25-Mg freight car B travel towards each other with the velocities shown. If the coefficient of restitut
irga5000 [103]

The speed of the car A is 6.05 m/s and  the speed of the car B just after the collision 7.65 m/s.

Ma=15 mg , Mb=25mg

Vai=5 m/s   vbi=7 m/s

We know coeffecient of restitution

e=|Vaf-Vbf/Vai-Cbi|

0.8=|Vaf-Vbf/5-7|

Vaf-Vbf=1.6

MaVa+mbVb=MaVaf+MbVbf

15*5*25*7=15Vaf+25Vbf

3Vaf+5Vbf=50

sovleving eq 1 and 2

Vbf =6.05 m/s

Vaf=7.65 m/s

The speed of a change in an object's location in any direction. The distance traveled divided by the time required to travel that distance is the definition of speed.Due to its lack of magnitude and merely having a direction, speed is a scalar number. The average speed of an object can be determined if you know the distance traveled and the time it took. Distance times speed is how speed is calculated.

Learn more about speed here:

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6 0
1 year ago
Who is Robert Goldard
balu736 [363]

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An am American engineer

8 0
3 years ago
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(a) In your own words, explain how donor impurities in semiconductors give rise to free electrons in numbers in excess of those
Kazeer [188]

Answer:

A. N type impurities

B. P type impurities

Explanation:

A. The impurities contribute free electrons and changing the conducting property of the semi conductor. When a pentavalent impurities in a semi conductor( impurities with five valence electron) , the impurity atom replace some of the semi conductor atoms in the crystal structure where 4 of the valence electron would be involved in bonding of 4 neighbouring semiconductor while leaving the fifth electron to be free(negative charge carrier) which is available for detachment.

B. When a trivalence impurity is added to semiconductor, instead of excess electron, there will be excess hole created by crystals. Reason for this attribute is the trivalence atom will replace some tetra valence semiconductor atom, when three valence electrons of the 3 valence electrons of the trivalent impurity atom make bond with three neighbouring semiconductor which gives rise to lack of electron in the bond of the fourth neighbouring semiconductor which contribute a whole to the crystalline since trivalent impurity contribute excess holes to the crystal of semi conductor, this holes can accept electrons.

8 0
3 years ago
Sexual Harassment falls under Title IX. What are the two types of Sexual Harassment, not examples, but there are only two kinds.
Anit [1.1K]

Answer:

According to the Equal Employment Opportunity Commission (EEOC), there are two types of sexual harassment claims: "quid pro quo" and "hostile work environment." The EEOC provides guidance on defining sexual harassment and establishing employer liability. hope that helps

Explanation:

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3 years ago
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