1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vaieri [72.5K]
3 years ago
15

Anytime scaffolds are assembled or __________, a competent person must oversee the operation.

Engineering
2 answers:
egoroff_w [7]3 years ago
4 0
D. made because made is a synonym for assembled
ololo11 [35]3 years ago
3 0
B because of health and safety regulations
You might be interested in
A rigid bar pendulum is attached to a cart, which moves along the horizontal plane. The rigid bar has a center of mass at L/2. T
Vikentia [17]

Answer:

See the attached picture for answer.

Explanation:

See the attached picture for explanation.

4 0
3 years ago
A storage tank, used in a fermentation process, is to be rotationally molded from polyethylene plastic. This tank will have a co
NNADVOKAT [17]

Answer:

The volume up to cylindrical portion is approx  32355 liters.

Explanation:

The tank is shown in the attached figure below

The volume of the whole tank is is sum of the following volumes

1) Hemisphere top

Volume of hemispherical top of radius 'r' is

V_{hem}=\frac{2}{3}\pi r^3

2) Cylindrical Middle section

Volume of cylindrical middle portion of radius 'r' and height 'h'

V_{cyl}=\pi r^2\cdot h

3) Conical bottom

Volume of conical bottom of radius'r' and angle \theta is

V_{cone}=\frac{1}{3}\pi r^3\times \frac{1}{tan(\frac{\theta }{2})}

Applying the given values we obtain the volume of the container up to cylinder is

V=\pi 1.5^2\times 4.0+\frac{1}{3}\times \frac{\pi 1.5^{3}}{tan30}=32.355m^{3}

Hence the capacity in liters is V=32.355\times 1000=32355Liters

3 0
3 years ago
An oxygen–nitrogen mixture consists of 35 kg of oxygen and 40 kg of nitrogen. This mixture is cooled to 84 K at 0.1 MPa pressure
Tamiku [17]

Answer:

The mass of oxygen in liquid phase = 14.703 kg

The mass of oxygen in the vapor phase = 20.302 kg

Explanation:

Given that:

The mass of the oxygen m_{O_2} = 35 kg

The mass of the nitrogen m_{N_2} = 40 kg

The cooling temperature of the mixture T = 84 K

The cooling pressure of the mixture P = 0.1 MPa

From the equilibrium diagram for te-phase mixture od oxygen-nitrogen as 0.1 MPa graph. The properties of liquid and vapor percentages are obtained.

i.e.

Liquid percentage of O_2 = 70% = 0.70

Vapor percentage of O_2 = 34% = 0.34

The molar mass (mm) of oxygen and nitrogen are 32 g/mol and 28 g/mol respectively

Thus, the number of moles of each component is:

number of moles of oxygen = 35/32

number of moles of oxygen =  1.0938 kmol

number of moles of nitrogen = 40/28

number of moles of nitrogen = 1.4286  kmol

Hence, the total no. of moles in the mixture is:

N_{total} = 1.0938+1.4286

N_{total} = 2.5224 \ kmol

So, the total no of moles in the whole system is:

N_f + N_g = 2.5224 --- (1)

The total number of moles for oxygen in the system is

0.7 \ N_f + 0.34 \ N_g =  1.0938 --- (2)

From equation (1), let N_f = 2.5224 - N_g, then replace the value of N_f into equation (2)

∴

0.7(2.5224 - N_g) + 0.34 N_g = 1.0938

1.76568 - 0.7 N_g + 0.34 N_g = 1.0938

1.76568 - 0.36 N_g = 1.0938

1.76568 - 1.0938 = 0.36 N_g

0.67188  = 0.36 N_g

N_g = 0.67188/0.36

N_g = 1.866

From equation (1)

N_f + N_g = 2.5224

N_f + 1.866 = 2.5224

N_f = 2.5224 - 1.866

N_f = 0.6564

Thus, the mass of oxygen in the liquid and vapor phases is:

m_{fO_2} = 0.7 \times 0.6564 \times 32

m_{fO_2} = 14.703 \ kg

The mass of oxygen in liquid phase = 14.703 kg

m_{g_O_2} = 0.34 \times 1.866 \times 32

m_{g_O_2} = 20.302 \ kg

The mass of oxygen in the vapor phase = 20.302 kg

8 0
3 years ago
Assume all surface are smooth Draw the FBD for each body
victus00 [196]

Answer: I’ll send picture

Explanation:

7 0
3 years ago
Technician A says that the B-pillars aid in resisting roof crush.
Andreyy89

Answer:

The answer is "Both A and B" are right

Explanation:

During the previous twenty years car producers have made significant advances in planning vehicle structures that give more noteworthy tenant insurance in planar accidents (Lund and Nolan 2003). Be that as it may, there has been little agreement with respect to the significance of rooftop strength in rollover crashes, just as the best strategy for surveying that strength. In 2006 one-fourth of lethally harmed traveler vehicle tenants were associated with crashes where vehicle rollover was considered the most hurtful occasion (Protection Establishment for Expressway Wellbeing, 2007). Numerous lethally harmed tenants in rollovers are unbelted, and some are totally or mostly launched out from the vehicle (Deutermann 2002).

There is difference concerning how underlying changes could influence launch hazard or the danger of injury for inhabitants who stay in the vehicle, paying little mind to belt use.

6 0
2 years ago
Other questions:
  • What is the area enclosed by the cycle area of the Carnot cycle illustrating on a P-V diagram?
    7·1 answer
  • Eutectic product in Fe-C system is called A. Pearlite B. Bainite C. Ledeburite D. Spheroidite
    13·1 answer
  • The elastic settlement of an isolated single pile under a working load similar to that of piles in the group it represents, is p
    8·1 answer
  • An AX ceramic compound has the rock salt crystal structure. If the radii of the A and X ions are 0.137 and 0.241 nm, respectivel
    10·1 answer
  • I = 48 mA, R = 1125 2. What is Vs ?
    14·1 answer
  • What was the first roblox player A.bob B.roblox C.builderman
    5·2 answers
  • Which statement about lean manufacturing is true when you compare it to mass production?
    7·1 answer
  • Explain the proper uses of shop equipment. (explain to me how to use 3 pieces of shop equipment.)
    7·1 answer
  • Plz help electrical technology
    15·2 answers
  • A furniture manufacturer purchases a drill press machine enabled with 5G and edge computing capabilities to keep the machine ope
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!