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
lilavasa [31]
3 years ago
14

Two steel plates are to be held together by means of 16-mm-diameter high-strength steel bolts fitting snugly inside cylindrical

brass spacers. Knowing that the average normal stress must not exceed 210 MPa in the bolts and 145 MPa in the spacers, determine the outer diameter of the spacers that yields the most economical and safe design.
Engineering
1 answer:
dusya [7]3 years ago
5 0

Answer:

The outer diameter of the spacers that yields the most economical and safe design is 25.03 mm

Explanation:

For steel bolt

Stress = 210 MPa or 210 N/mm2

Pressure = Stress* Area

Pbolt = 210 N/mm2 * 16^2 *(pi)/4

Pbolt = 210 N/mm2 * 200.96 mm^2 = 42201.6  N

For Brass spacer

Pressure = 42201.6  N

Area of Brass spacer = Pressure/Stress

Area of Brass spacer = 42201.6  N/145 N/mm^2 = 291.044 mm^2

Area of Brass spacer = (pi) (d^2 - 16^2)/4 =  291.044 mm^2

d^2 - 16^2 = 291.044 mm^2* 4/(pi) = 370.758

d^2 =  370.758 + 16^2

d^2 =   626.758

d = 25.03 mm

The outer diameter of the spacers that yields the most economical and safe design is 25.03 mm

You might be interested in
What does STP and NTP stands for in temperature measurement?
Lisa [10]

STP stands for standard temperature pressure and NTP stands for normal temperature pressure

8 0
4 years ago
John Locke believed that:
Sholpan [36]

Answer:<em>, Locke believed that human nature gave people the chance to be selfish. This is apparent with the introduction of currency. In a natural state, all people were equal and independent and alone at times, and everyone had a natural right to defend his "life, health, liberty, or possessions.."</em>

<em>Explanation:</em>

3 0
3 years ago
A heavy ball with a weight of 150 N is hung from the ceiling of a lecture hall on a 4.0-m-long rope. The ball is pulled to one s
shusha [124]

Answer:

The tension in the rope at the lowest point is 270 N

Explanation:

Given;

weight of the ball, W = 150 N

length of the rope, r = 4 m

velocity of the ball, v = 5.6 m/s

When the ball passes through the lowest point, the tension on the rope is the sum of weight of the ball and centripetal force.

T = W + F

Centripetal force, F = mv²/r

where;

m is the mass of the ball

m = W/g

m = 150 / 9.8 = 15.306 kg

Centripetal force, F = mv²/r

F = (15.306 x 5.6²)/4

F = 120 N

T = W + F

T = 150 + 120

T = 270 N

Therefore, the tension in the rope at the lowest point is 270 N

6 0
3 years ago
3<br> Current is measured in units called
bixtya [17]

Answer:

current is measured in Ampere (A)

6 0
3 years ago
Read 2 more answers
Injector orifice patterms and size will affect propellant mixing and distribution. a)-True b)-False
alina1380 [7]

Answer: True

Explanation: Injector orifice is the factor which describes the size of the opening of the injector .There are different pattern and size of the opening for the injector which affects the mixture of the chemical substance that is used for the production of the energy that is known as propellant.

The pattern and size of the orifice will define the variation in the amount of energy that could be produced.Thus the statement given is true.

4 0
3 years ago
Other questions:
  • 1. Create a class called Name that represents a person's name. The class should have fields named firstName representing the per
    8·2 answers
  • Is CO, an air pollutant? How does it differ from other emissions resulting from the combustion of fossil fuels?
    7·1 answer
  • Define ""acidity"" of an aqueous solution. How do you compare the strength of acidity of solutions ?
    6·1 answer
  • Who can work on a fixed ladder that extends more than 24 feet?
    11·1 answer
  • #198. Moment of inertia about center of a segmented bar A bar of width is formed of three uniform segments with lengths and area
    7·1 answer
  • A refrigerator operates on average for 10.0 hours an day. If the power rating is the refrigerator is 709 w how much electrical e
    13·1 answer
  • During genetic engineering, how do Restriction enzymes know what base pairs to act on?
    10·1 answer
  • What is the difference between POP3 and IMAP?
    5·1 answer
  • Is santa real or nah is santa real or nah
    7·2 answers
  • When you approach an uncontrolled intersection, you should treat it as though which sign is present?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!