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:
It means that a feature is dimensioned more than once.
For example, suppose you have a drawing of a rectangle, and the width is dimensioned twice. That's an example of over-dimensioning.
Of course, that's a rather obvious example. Sometimes it's more subtle. Suppose the rectangle has the width and height dimensioned, but also the diagonal. This is also an example of over-dimensioning. If the width and height are dimensioned, then you don't need to dimension the diagonal; that's already fixed by Pythagorean theorem.
Answer:
See explanation
Explanation:
Since no figure was given, I'll explain how to theoretically solve this problem.
When a pin is resolved it has 2 reaction forces, one in the horizontal direction and one in the vertical. For this problem you could name these Ax and Ay. These two forces will act where the pin is, with Ax acting in the horizontal direction and Ay acting in the vertical.
When a rocker is resolved, it has one reaction force that acts perpendicular to the surface the rocker is on. This force can be thought of as B and it acts where the rocker is.
If you are determining the value of Ax, Ay, and B you should use static equilibrium and data given on the figure to solve for the reaction forces. The equations for static equilibrium (2D) are
,
, and
.
Answer:
2062 lbm/h
Explanation:
The air will lose heat and the oil will gain heat.
These heats will be equal in magnitude.
qo = -qa
They will be of different signs because one is entering iits system and the other is exiting.
The heat exchanged by oil is:
qo = Gp * Cpo * (tof - toi)
The heat exchanged by air is:
qa = Ga * Cpa * (taf - tai)
The specific heat capacity of air at constant pressure is:
Cpa = 0.24 BTU/(lbm*F)
Therefore:
Gp * Cpo * (tof - toi) = Ga * Cpa * (taf - tai)
Ga = (Gp * Cpo * (tof - toi)) / (Cpa * (taf - tai))
Ga = (2200 * 0.45 * (150 - 100)) / (0.24 * (300 - 200)) = 2062 lbm/h
Answer:
it states sources where it got the info from
Explanation: