Answer:
275 MPa
Explanation:
Regardless of what it is holding, the stiffness of a bolt depends on its own material properties and geometry.
The stiffness is:
![k = E * \frac{A}{l}](https://tex.z-dn.net/?f=k%20%3D%20E%20%2A%20%5Cfrac%7BA%7D%7Bl%7D)
I assume this one is made of steel, because regular bolts are steel.
The Young's modulus for steel is E = 210 GPa
The longitude is given. (But note that in a real application you have to consider the length up to the nut.)
The section is (using the nominal diameter of 10 mm)
![A = \frac{\pi * d^2}{4} = \frac{\pi * 0.01^2}{4} = 7.85e-5 m^2](https://tex.z-dn.net/?f=A%20%3D%20%5Cfrac%7B%5Cpi%20%2A%20d%5E2%7D%7B4%7D%20%3D%20%5Cfrac%7B%5Cpi%20%2A%200.01%5E2%7D%7B4%7D%20%3D%207.85e-5%20m%5E2)
Then:
![k = 2.1e11 * \frac{7.85e-5}{0.06} = 275e6 Pa = 275 MPa](https://tex.z-dn.net/?f=k%20%20%3D%202.1e11%20%2A%20%5Cfrac%7B7.85e-5%7D%7B0.06%7D%20%3D%20275e6%20Pa%20%3D%20275%20MPa)
Answer:
Energy Density: 129.412 ![\frac{Wh}{kg}](https://tex.z-dn.net/?f=%5Cfrac%7BWh%7D%7Bkg%7D)
Explanation:
First of all, let's convert the battery weighing from pounds to kilograms:
0.525 lb x
= 0.238 kg
Now let's convert the electrical energy from kcal to Wh:
30.8 kcal x
= 30.8 Wh
Now we can calculate energy density as follows:
Energy Density = ![\frac{30.8}{0.238}](https://tex.z-dn.net/?f=%5Cfrac%7B30.8%7D%7B0.238%7D)
Energy Density = 129.412
Answer:
Set the direction of the car. ...
Provide stability to the car while running. ...
Prevents vibrations from reaching the steering wheel. ...
Minimize tire wear. ...
Provides a straightening effect to the front wheels.
Answer:
Explanation:
Define the purpose of the survey.
Make every question count.
Keep it short and simple.
Ask direct questions.
Ask one question at a time.
Avoid leading and biased questions.