HELP PLEASE<br> this is for drivers ed btw

A circular bar will be subjected to an axial force (P) of 2000 lbf. The bar will be made of material that has a strength (S) of

schepotkina [342]

Answer:

$n = 2.36$

Explanation:

The stress experimented by the circular bar is:

$\sigma = \left[\frac{2000\, lbf}{\frac{\pi}{4}\cdot (0.5\,in)^{2}}\right]\cdot \left(\frac{1\,kpsi}{1000\,psi} \right)$

$\sigma = 10.186\,kpsi$

The safety factor is:

$n = \frac{24\,kpsi}{10.186\,kpsi}$

$n = 2.36$

5 0

3 years ago

Which option identifies the next step Kristin should take to test the design in the following scenario?

Nadusha1986 [10]

The 2d sketch should be right

4 0

3 years ago

A heavy-duty electrical resistor is 2cm in diameter by 16cm long. 5 amps of current through it heats the resistor to 100°C, and

Olenka [21]

Answer:

The convective coefficient is 37.3 W/m²K.

Explanation:

Use Newton’s law of cooling to determine the heat transfer coefficient. Assume there is no heat transfer from the ends of electric resistor. Heat is transferred from the resistor curved surface.

Step1

Given:

Diameter of the resistor is 2 cm.

Length of the resistor is 16 cm.

Current is 5 amp.

Voltage is 6 volts.

Resistor temperature is 100°C.

Room air temperature is 20°C.

Step2

Electric power from the resistor is transferred to heat and this heat is transferred to the environment by means of convection.

Power of resistor is calculated as follows:

P=VI

$P=6\times5$

P= 30 watts.

Step3

Newton’s law of cooling is expressed as follows:

$Q=h\times \pi DL(T_{r}-T_{\infty})$

Here, h is the convection heat coefficient and $\pi DL$ is the exposed surface area of the resistor.

Substitute the values as follows:

$30=h\times \pi (2cm)(\frac{1m}{100cm})(16cm)(\frac{1m}{100cm})(100-20)$

$h=\frac{30}{0.8042}$

h = 37.3 W/m²K.

Thus, the convective coefficient is 37.3 W/m²K.

6 0

3 years ago

Name the five points where product should be scanned during it's path throughout the warehouse.

Oxana [17]

Answer and Explanation:

A warehouse can be defined as a place:

is a spot or building, where the articles are kept, put away or in some cases prepared.

Depending on the sort of use, the checkpoints may fluctuate.

There can be numerous sorts, for example, pressing, railroad wagon, cool stockpiling, and so on.

Suppositions are caused in regards to each shape and a few checkpoints for an item to can be summed up.

The point of entry, where it ought to be through into the product house.

Security checkpoint, where the item belonging is to be protected.

Palletized segment, where the item is to be put in a spot and it determines the location of that item in the house.

Quality or bundling segment, where the item must be tried and improved.

Leave segment, through which it must be taken out for further procedures.

7 0

3 years ago

Assume you are an observer standing at a point along a three-lane roadway. All vehicles in lane 1 are traveling at 30 mi/h, all

garik1379 [7]

Answer:

Explanation:

Given data;

In line 1, v1 = 30mi/hr

in line 2, v2 = 45mi/hr

in line 3, v3 = 60mi/hr

therefore time mean speed = v1 + v2 + v3 /n

= VT = 45mi/hr

space mean speed ; Vs

harmonic mean = 1/V = 1/v1 + 1/v2 + 1/v3

V = 13.85mi/hr

Hence Vs = V x n = 3 x 13.85 = 41.55mi/hr

5 0

2 years ago

HELP PLEASE this is for drivers ed btw